JK digital currency

1.

Radar money is a kind of money used in pyramid selling. If the investment should be unreliable, you can also consult relevant professionals

in essence, bitcoin is a virtual currency with limited supply of blockchain technology. Reborn and many other currencies are counterfeit bitcoin. They also use blockchain and limited supply. However, because they are not original, the mass base is weak, and the total amount is more than bitcoin, the speculation price can not catch up with bitcoin. However, several hundred kinds of virtual coins, such as v-treasure coin, later radar coin and so on, are falsely advertised as limited in total amount. In fact, they are digital coins with unlimited supply. In essence, they are a kind of game currency technology plus pyramid marketing propaganda

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4. Game with easy language proction, 360 false positives, please add trust

you can make your own stand-alone game, which is up to level 80. You can play it when you are bored.

5. The first chapter is about the atomic structure and periodic system of elements
2. Break the normal arrangement rules of elements in the three-dimensional world, let the contestants arrange elements electronically or redraw the periodic table of elements under new conditions or "rules", and speculate the valence and properties of elements
3. According to the relationship between several elements, their positions in the periodic table can be inferred
4. Apply the knowledge of chemistry, physics and other disciplines to investigate the latest scientific and technological achievements
trend prediction: the future chemical competition questions will emphasize the connection between chemistry and physics, and the application of atomic structure and periodic system knowledge in daily life. To test the contestants' creative thinking ability of breaking "old knowledge" and establishing "new knowledge". The author believes that: if we examine the above knowledge points, we will still make an article in the above aspects< The relative atomic mass (atomic weight) of an element is the ratio of one mole mass of an element to one mole mass of nuclide 12C. This definition shows that: (1) the relative atomic mass of an element is a pure number. ② The relative atomic mass of a single nuclide element is equal to that of its nuclide. ③ The relative atomic mass of a multi nuclide element is equal to the weighted average of the relative atomic mass of its natural isotopes< (1) Bohr planetary model of atomic structure (motion of extranuclear electrons)
1. Hydrogen atomic spectrum
Balmer found out in 1833 that the relationship between the wavelengths of all spectral lines in the visible region of hydrogen atomic spectrum is that B is a constant
in 1913, Rydberg summed up the general formula of the relationship between spectral lines ν= R (1 / n12-1 / N22), R is Rydberg constant, its value is 3.19 × 1015 cycles per second. The relationship between the above formula N1 and N2 corresponding to the spectral lines in each region is:
in the ultraviolet region: N1 = L, N2 = 2, 3, 4...
in the visible region: N1 = 2, N2 = 3, 4, 5...
in the infrared region: N1 = 3, N2 = 4, 5, 6...
2. Bohr's Theory (characteristics of the motion of the extranuclear electrons)
in 1913 Bohr's Planck quantum theory On the basis of Einstein's photonics theory and Rutherford's nuclear atom model, in order to clarify the results of hydrogen atomic spectrum experiment, three hypotheses of atomic structure theory, called Bohr theory, are put forward. The main points are as follows:
① the electrons outside the atomic nucleus do not move around the nucleus in any orbit, but the orbital angular momentum P must meet the following conditions:
P = NH / 2 π， N is a positive integer and H is the Planck constant. The orbit that meets the above conditions is called stable orbit, and the electrons moving on the stable orbit do not release energy< (2) the farther the electron orbit is from the nucleus, the higher the energy is. Usually the electron moves in the nearest orbit to the nucleus, when the energy of the atom is the lowest, which is called the ground state. When the atom gains energy from the outside, the electron can jump to the high energy orbit far away from the nucleus, which is called the excited state
③ the excited state is unstable, the electron will jump from the higher level to the lower level, and release the excess energy in the form of light< At the same time, Bohr also calculated and deced the energy formula according to the classical mechanics and quantization conditions:

Bohr theory has great limitations, it can only explain the atomic spectrum of hydrogen, can not explain the atomic spectrum of multi electron system, and even can not explain the fine structure of hydrogen spectrum. At the beginning of the 19th century, e to the experiments of light interference, diffraction and photoelectric effect, people knew the special law of microscopic particle motion wave particle ality. These two properties were quantitatively linked by Planck constant, e = H ν P＝h/ λ， So the essence of light is revealed. Where e is energy and P is momentum, λ Is the wavelength, h is the Planck constant. Later, electron diffraction experiments proved the wavelength of electrons λ= h/m υ， M is the mass of the electron, υ Is the velocity of the electron< (2) the quantum mechanical model of hydrogen atomic structure (motion state of extranuclear electrons)
(1) probability density and electron cloud
Ψ｜ 2 is the probability of electrons appearing in the unit volume element of extra nuclear space, which is called probability density. The proct of the probability density and the total volume of the region is the probability of electrons appearing in the region
electron cloud is a kind of image to describe the motion of electrons outside the nucleus, which is related to probability density Ψ｜ 2, it is based on the concept of statistics to visualize the probability density of extranuclear electrons. That is Ψ｜ 2< (2) the physical meaning of the four quantum numbers
a. the main quantum number n is the number of electron layers, the average distance from the electron to the nucleus and the energy level. The values are 1, 2, 3,..., 0 (positive integer)
B. the angular quantum number L, which determines the shape of the atomic orbit (or electron cloud), is 0, 1, 2,..., (n-l). For example, when l = 0, it is an s orbit with star shape distribution; When l = 1, it is a p-orbit with mbbell distribution; When l = 2, it is d-orbit and petal shaped. In the multi electron system, l is also related to energy, just as the energy of each sublayer orbit in a main layer is different, that is, ENS < ENP < end
C. the magnetic quantum number m determines the extension direction of the atomic orbit (or electron cloud) in space. The value is 0, ± 1， ± 2，…， ± L
for example, when l = 1, M can have three values, namely 0, + 1 and - 1, indicating that there are three different extension directions of P sublayer orbits, namely Px, py and PZ
D. the spin quantum number MS does not depend on N, l and m. It is not the result of solving Schrodinger equation, but the result of experimental measurement. It shows that electrons rotate clockwise or counterclockwise about their own axis. The values are + 1 / 2 or - 1 / 2 respectively< Third, the arrangement of extranuclear electrons, the periodic system of elements and the periodicity of elements. ② Pauli's incompatibility principle. ③ The hunt rule
2. Shielding effect in a multi electron atom, e to the repulsive effect of other electrons on an electron, a part of the nuclear charge is offset, resulting in the decrease of the effective nuclear charge and weakening the attraction of the nuclear charge to the electron, which is called shielding effect or shielding effect. Due to the shielding effect, the energy levels of different sublayer orbitals with the same principal quantum number are split. The penetration effect refers to the phenomenon that the outer electrons drill into the inner space and get close to the nucleus. The order of electron penetration effect in each sublayer is ns > NP > nd > NF. The deeper the electron penetrates, the less it is shielded by other electrons, the more attractive it is to the nucleus, and thus the lower its energy. Therefore, the order of orbital energy of each sublayer with the same N and different L is ENS < ENP < end < enf. When n and L are different, the energy levels are staggered, that is e4s < E3D. This phenomenon is related to the penetration effect of electrons. Because the penetration ability of 4S is stronger than that of 3D, although the maximum peak of 4S is far away from the nucleus than that of 3D, because it has a small peak which drills very close to the nucleus, it has a great influence on recing the orbital energy, resulting in e4s < E3D< The relationship between the atomic structure and the position of an element in the periodic table is discussed. A group of energy levels is equivalent to a period, which can be divided into long and short periods. Short period (there are only s and P levels in the energy level group). Long period (in addition to s and P levels, there are also D and F levels in the energy level group)
2. The elements with the same valence electron structure have the same family number. There are two kinds of Clans: Main clans and sub clans. The main group is usually called a group and the sub group is called B group
group a element: its group number is equal to the number of electrons in NS and NP layers, such as 3s23p4, which is the Group VI a element of the third period
group B elements: A. when the total number of electrons on the (n-1) DNS layer is 3 ~ 7, the number of electrons is the group B number of the element. For example, 5d56s2 is the element of group Ⅶ B in the sixth period
B. when the total number of electrons in (n-1) DNS layer is 8 ~ 10, they are all group VIII elements, such as 3d84s2, which is the Group VIII element in the fourth period
C. when (n-1) d10ns, the total number of electrons on the NS layer is the number of group B. For example, 4d105s2 is the group II element of the fifth cycle< (3) the grouping of elements in the periodic table

5. The periodic relationship between the atomic structure and the properties of elements
1. The variation of atomic radius in the periodic table: from top to bottom in the same main group, the atomic radius increases with the increase of the number of electron layers. Although the increase of nuclear charge from top to bottom tends to rece the atomic radius, it is not the main factor. The change of group B elements is not obvious, especially for the elements of the fifth and sixth cycle, because of the shrinkage of lanthanide, the radii are very similar. In the same period, for the short period, with the increase of the nuclear charge number from left to right, the attraction of the nucleus to the outer electrons increases correspondingly, and the atomic radius decreases graally. For the long period, as the number of nuclear charges increases, the newly added electrons fill the (n-1) d orbital. For the outermost electron layer which determines the size of atomic radius, the shielding effect of electrons on the secondary outer layer is much greater than that between the outermost electrons. Therefore, most of the increased nuclear charges from left to right are shielded by the increased (n-1) d electrons, that is, the effective nuclear charges increase slowly, so the atomic radius decreases little from left to right. When the electron layer structure is (n-1) D10, the atomic radius increases slightly e to the larger shielding effect on the outer electrons. When the electron layer structure is (n-2) F7 and (n-2) F14, the atomic radius increases slightly, and the atomic radius of noble gas increases suddenly at the end of each cycle The radius of noble gas is van der Waals radius
② the ionization potential and electron affinity of electronegative elements only reflect the ability of atoms to gain and lose electrons from one aspect, but in fact they have some limitations. When atoms combine with each other, the difficulty of losing electrons and getting electrons must be considered together. The ability of an atom to attract electrons in a molecule is usually called the electronegativity of an element. According to the electronegativity of elements, the strength of metallic and non-metallic elements can be measured. The electronegativity of elements also shows a periodic change, the general trend of change: the same period increases from left to right, the same family decreases from top to bottom. Therefore, according to the periodic table, the electronegativity of fluorine in the upper right is the highest, that is, the non-metallic element is the strongest, and the electronegativity of cesium in the lower left is the lowest, that is, the gold attribute is the strongest< (4) using s, P, D to represent the ground state configuration (including neutral atoms, positive ions and negative ions)

Chapter 2 molecular structure

competition point inction: the judgment of molecular structure is the most basic knowledge of chemistry, and also the knowledge point of chemical competition examination. In recent years, the knowledge points often appear in the chemical competition when examining the molecular structure are as follows:
1. According to the hybrid orbital theory, the hybrid state of the central atom can be judged
2. Judging the shape of molecules according to Lewis electron theory
3. The shape of the molecule can be judged according to the valence layer electron pair repulsion theory
4. The structure of unknown molecules can be determined according to the isoelectronic principle
of course, there are many forms of examination, and the form of examination is not single

6. There are three basic types of currency in the wizarding world:
jinjialong
yinxike
tongnat
there is a circle of numbers on the edge of Jialong, which is the number engraved on the goblin of gulinger coins. We don't know if SIKO and Nate have the same number, but it's likely that they do
to facilitate your calculation, we provide the wizard Muggle coin converter
if you don't use a calculator, the conversion of these coins is a bit complicated for Muggles, but it's easy for witches. Hagrid said: "the gold coin is a gallon, 17 silver Sikes for one gallon, 29 Nath for one Sike. It's simple enough." So 1 gallon = 17 SIKO = 493 NAT
JK Rowling said in an interview (CR) that according to her estimation, the value of a gallon is "about 5 pounds", or 7.33 dollars. In the introctions of Quidditch and magical animals, it is mentioned that 250 billion US dollars is equal to 34 billion galleons. That is, one gallon = 5 pounds sterling = 70 RMB

7. First, analyze the motion: in the process of the interaction of three objects, when C is on B, C is decelerating and B is accelerating; If the energy of C enables C to leave B and reach a, then C will continue to decelerate, and B will move at a constant speed thereafter, and a will be accelerated. If the energy of C is not enough to make C leave a, then the final speed of a and C is the same. Analysis: the dynamic friction force F on C= μ NC= μ mCg=1N; When C reaches the junction of a and B, the work done by friction on a and B increases the kinetic energy of AB, while the kinetic energy of C decreases. At this time, the common velocity of AB is the final velocity of B, and the relative motion of C on a (or b) is l = 1m. The energy (only kinetic energy) of the system decreases by ES = FL = 1J. It is easy to solve this problem by conservation of momentum. According to the conservation of energy, (mcvc12) / 2 (MA, MB) VB2 / 2 = E0 es, according to the conservation of momentum, mcvo = mcvc1 (MA, MB) VB, when CB is relatively stationary, according to the conservation of momentum, mcvo = mbvb (MA, MC) VA, where E0 = (mcvo2) / 2 solves the above four equations, that is, VA = VC = 2 (1 √ 6) / 15 = 0.563, VB = (4 - √ 6) / 10 = 0.155

8. First of all, gold does not always depreciate. In the short term, the price of gold is likely to fall. It should be said that in the long run, the price of gold will not fall. In the long run, gold will keep its value
then, the long-term value preservation of gold is determined by three factors: scarcity, rability and standardization
first, scarcity. The main gold procing countries are China, Australia, the United States, Russia, etc. Because the world reserve of gold is very low, it can be used as a general equivalent to a relatively high value commodity. If it's copper or lead, it won't work. There are too many reserves of these two metals. A counterexample: diamonds. The scarcity of gold is natural, while the scarcity of diamonds is man-made. De Beers, the world's largest diamond dealer, monopolizes the global diamond mines. The supply to the market is only one tenth of the proction capacity. In this way, the value of diamonds can be improved. If the diamond is purchased, the price of diamond recovered by diamond dealers is very low. Someone has done an experiment, spending money to buy a bare diamond, and then immediately went to a nearby diamond shop to try to sell it. The highest price of a diamond shop is only one third of the purchase price
the second point is rability. As a long-term value preserving commodity, it can't be oxidized and corroded after several decades, which is equivalent to devaluation. Gold Au, an inert element, hardly proces any chemical reaction in daily life. So hundreds of years later, a gold bar is still a gold bar, and it will hardly be oxidized. As a counter example, pearls, which are also very rare and valuable, have disappeared after hundreds of years. This is also the reason why it is almost impossible to excavate hundreds and thousands of years of pearls in archaeological excavation
thirdly, standardization. As long as the gold content (purity) is determined, the value of gold is determined, and it is easy to be valued and traded. Other gems and even diamonds need to be valued by professional appraisers. For example, the 4C of diamond valuation (carat # 8194; Weight, clarity, color and cut are very complicated and subjective
gold investment, e to its characteristics, is destined to be a long-term hedge, but not too profitable investment method. Many investors will use gold as a way of hedging investment, and other high-risk and high return investment portfolio, to achieve the purpose of "advance can attack, retreat can defend".

9.

For the first time, the eight digit Arabic numerals are printed in descending order

the prefix number is not the standard to distinguish whether the banknote is counterfeit or not. In fact, the fifth set of RMB 100 notes has six anti-counterfeiting features

there is a holographic magnetic window opening safety line on the right side of the middle of the back of the banknote. The holographic pattern composed of the miniature character "￥ 100" can be seen in the window opening part, and the instrument has magnetism; The watermark can be seen on both sides of the bill. Facing the light, you can see a dim image similar to the main scene of Mao Zedong's head

extended data:

there are new changes in the crown design of the fifth set of RMB. Its main features are: it adopts horizontal and vertical double numbers, with two identical or different Chinese Pinyin letters as the crown characters, eight Arabic numerals, the horizontal crown number is black, printed in the lower left corner of the ticket, the vertical crown number is blue, printed on the right side of the ticket. This is the crown design form commonly used in the world

in addition, the circulation Commemorative Banknote "Celebrating the 50th anniversary of the founding of the people's Republic of China" issued on September 20, 1999 has a more unique crown design: the crown only uses a Chinese phonetic alphabet "J", and the eight digit Arabic numeral number is printed from large to small for the first time, which makes the crown more artistic

10. At present, bitcoin can only be traded in the secondary market, so I suggest you trade on a large exchange, such as okex bitcoin exchange, which is the largest exchange in the world. A good platform is the basis for trading bitcoin, so don't do it on an unknown Shanzhai platform. If you agree with my answer, please accept it