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The stronger the metallicity of the element, the stronger the alkalinity of the hydrate corresponding to the highest valence oxide, the higher the pH of the solution. The stronger the non metallicity of the element, the stronger the acidity of the hydrate corresponding to the highest valence oxide, the lower the pH of the solution. According to the image, if x has no highest valence oxide, then x is O, if y has the highest alkalinity, then y is Na, Z is al, W and R are s and Cl, respectively.
A. x is O, y is Na, the ion radius of X and Y is larger, so a is wrong
B. the stronger the nonmetallic element is, the more stable the corresponding gaseous hydride is. If the nonmetallic CL is greater than s, the corresponding gaseous hydride stability CL is greater than s, so B is correct
C. The compound formed by X, y and Z is NaAlO < sub > 2 < / sub >, which is a strong base and weak acid salt. It is alkaline in solution, so C is correct
the compound formed by D.Z and R is ALCL < sub > 3 < / sub >, aluminum hydroxide, hydrogen and chlorine are obtained by electrolysis of its aqueous solution, but al is not obtained, so D is wrong
so BC
Z. E nomenclature is also called Z, e notation. First, according to the order rule, the priority of the two atoms or bases connected to two double bond carbon atoms is compared; Better & quot; When the atom or group is on the same side of the double bond, its configuration is expressed by Z (German zusammen, meaning the same side), which is called Z formula& quot; Better & quot; When the atom or group is on the opposite side, its configuration is expressed by E (German entgegen, opposite meaning), which is called e formula. Then, the corresponding olefin names are preceded by & quot Z)-" Or & quot E)-"， That is the full name
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CL: [ne] 3S (2) 3P (5) first electron affinity 349kj / mol
br: [ar] 4S (2) 4P (5) first electron affinity 324.5kj/mol
I: [Kr] 4D (10) 5S (2) 5p (5) first electron affinity 295kj / mol
at: [Xe] 4f (14) 5D (10) 6S (2) 6p (5) first electron affinity 270kj / mol
obviously, The first electron affinity energy CL of halogen atom is the largest. The affinity energy is the energy released by the atom after capturing a free electron. For halogen atom, the free electron trapped by the atom is trapped in the outermost PZ orbit The p-orbitals are divided into Px, py and PZ, one in each direction, and each orbit can hold two electrons with opposite spin The outermost layer of halogen is p (5) structure, that is to say, halogen atom can also accept an electron to become a negative ion
it can be described as a classical one that the potential energy EP = - Ze & sup2 / 4 of the electrons moving around the nucleus πε R [with infinite distance as the zero potential energy surface, Z is the atomic number, e is the electric quantity of the electron, ε Is the dielectric constant in vacuum, R is the radius of electron around the nucleus, the process of halogen from atom to ion, the radius of electron around the nucleus after being captured, R can be considered as the atomic radius Obviously, the larger the radius r, the larger the EP; The free electron [potential energy EP = 0] is captured and the released energy is Ze & sup2 / 4 πε r. The affinity energy is e ∝ (1 / R); From F to at, the radius of halogen atom becomes larger and the energy released is smaller
this is a rough model, which ignores the shielding effect of the original electrons of halogen atoms. For elements with larger atomic radius, the shielding effect has little effect on the newly added electrons, but the radius of the atom itself is very small. For example, F, because of its small atomic radius, its electron cloud density, nine electrons are "compressed" in a small space, The repulsion of the newly added electrons becomes obvious, so that the first electron affinity of F is less than that of Cl, and Cl is the element with the largest first electron affinity of all halogen elements!
CAS number:
Property: an ethylene coordination compound. It got its name from the discovery of W. E. Zeise, a Danish pharmacist, in 1827. The [Pt · (C2H4) CL3] - anion in chase salt has a plane square geometry, as shown in the figure. The chemical bond between Pt (Ⅱ) and C2H4 is σ-π With the bond. Zeiss salt is a lemon yellow crystal. Its ethanol solution reacts with concentrated hydrochloric acid to obtain an orange dimer. The dimer is dissolved in acetone at 70 ℃ and reacts with ethylene to form a yellow and unstable trans diethylene crystal. The proct can be prepared by the reaction of potassium chloroplatinate (K2 [PtCl4]) with ethyne. σ-π The synergistic effect of coordination bond weakens the C = C chemical bond in ethylene molecule, which makes ethylene easy to react e to activation. Therefore, it is of great significance in organic synthesis. See also http://zh.wikipedia.org/wiki/%E8%94%A1%E6%96%AF%E7%9B%90
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Ac 89 锕 锕 Actinium
Ag 47 银 银 Silver (来自拉丁语Argentum)
Al 13 铝 铝 Aluminium
Am 95 鎇、鋂 镅 Americium
Ar 18 氩 氩 Argon
As 33 砷 砷 Arsenic
At 85 砹 砹 Astatine
Au 79 金 金 Gold (来自拉丁语Aurum)
B 5 硼 硼 Boron
Ba 56 钡 钡 Barium
Be 4 铍 铍 Beryllium
Bh 107 𨨏 Bohrium
Bi 83 铋 铋 Bismuth
Bk 97 錇、鉳 锫 Berkelium
Br 35 溴 溴 Bromine
C 6 碳 碳 Carbon
Ca 20 钙 钙 Calcium
Cd 48 镉 镉 Cadmium
Ce 58 铈 铈 Cerium
Cf 98 鐦、鉲 锎 Californium
Cl 17 氯 氯 Chlorine
Cm 96 锔 锔 Curium
Co 27 钴 钴 Cobalt
Cr 24 铬 铬 Chromium
Cs 55 铯 铯 Caesium
Cu 29 铜 铜 Copper (来自拉丁语Cuprum)
Db 105 𨧀、 Dubnium
Ds 110 鐽 Darmstadtium
Dy 66 镝 镝 Dysprosium
Er 68 铒 铒 Erbium
Es 99 鎄、鑀 锿 Einsteinium
Eu 63 铕 铕 Europium
F 9 氟 氟 Fluorine
Fe 26 铁 铁 Iron (来自拉丁语Ferrum)
Fm 100 镄 镄 Fermium
Fr 87 钫、鍅 钫 Francium
Ga 31 镓 镓 Gallium
Gd 64 钆 钆 Gadolinium
Ge 32 锗 锗 Germanium
H 1 氢 氢 Hydrogen
He 2 氦 氦 Helium
Hf 72 铪 铪 Hafnium
Hg 80 汞 汞 Mercury (来自拉丁语Hydragyrum)
Ho 67 钬 钬 Holmium
Hs 108 𨭆 Hassium
I 53 碘 碘 Iodine
In 49 铟 铟 Indium
Ir 77 铱 铱 Iridium
K 19 钾 钾 Potassium (来自德语Kalium)
Kr 36 氪 氪 Krypton
La 57 镧 镧 Lanthanum
Li 3 锂 锂 Lithium
Lr 103 铹 铹 Lawrencium
Lu 71 鑥、镏 镥 Lutetium
Md 101 钔 钔 Mendelevium
Mg 12 镁 镁 Magnesium
Mn 25 锰 锰 Manganese
Mo 42 钼 钼 Molybdenum
Mt 109 䥑 Meitnerium
N 7 氮 氮 Nitrogen
Na 11 钠 钠 Sodium (来自拉丁语Natrium)
Nb 41 铌 铌 Niobium
Nd 60 钕 钕 Neodymium
Ne 10 氖 氖 Neon
Ni 28 镍 镍 Nickel
No 102 鍩 锘 Nobelium
Np 93 鎿、錼 镎 Neptunium
O 8 氧 氧 Oxygen
Os 76 锇 锇 Osmium
P 15 磷 磷 Phosphorus
Pa 91 镤 镤 Protactinium
Pb 82 铅 铅 Lead (来自拉丁语Plumbum)
Pd 46 钯 钯 Palladium
Pm 61 鉕 钷 Promethium
Po 84 钋 钋 Polonium
Pr 59 镨 镨 Praseodymium
Pt 78 铂 铂 Platinum
Pu 94 鈈、钸 钚 Plutonium
Ra 88 镭 镭 Radium
Rb 37 铷 铷 Rubidium
Re 75 铼 铼 Rhenium
Rf 104 炉、 Rutherfordium
Rg 111 錀 Roentgenium
Rh 45 铑 铑 Rhodium
Rn 86 氡 氡 Radon
Ru 44 钌 钌 Ruthenium
S 16 硫 硫 Sulphur
Sb 51 锑 锑 Antimony (来自拉丁语Stibium)
Sc 21 钪 钪 Scandium
Se 34 硒 硒 Selenium
Sg 106 𨭎、 Seaborgium
Si 14 硅、矽 硅 Silicon
Sm 62 钐 钐 Samarium
Sn 50 锡 锡 Tin (来自拉丁语Stannum)
Sr 38 锶 锶 Strontium
Ta 73 钽 钽 Tantalum
Tb 65 铽 铽 Terbium
Tc 43 鍀、鎝 锝 Technetium
Te 52 碲 碲 Tellurium
Th 90 钍 钍 Thorium
Ti 22 钛 钛 Titanium
Tl 81 铊 铊 Thallium
Tm 69 铥 铥 Thulium
U 92 铀 铀 Uranium
Uub 112 Ununbium
Uuh 116 Ununhexium
Uuo 118 Ununoctium
Uuq 114 Ununquadium
V 23 钒 钒 Vanadium
W 74 钨 钨 Tungsten (来自德语Wolfram)
Xe 54 氙 氙 Xenon
Y 39 钇 钇 Yttrium
Yb 70 镱 镱 Ytterbium
Zn 30 锌 锌 Zinc
Zr 40 锆 锆 Zirconium
/Zi enable debug information / Ze enable extension (default)
/ Zi enable edit and Continue debug information / ZL omit. Obj default library name
/ z7 enable legacy debug information / ZG generate function prototype
/ ZD only line number debug information / ZS only syntax check
/ ZP [n] wrap structure on n-byte boundary / VD {0 | 1} disable / enable vtordisp
/ Za disable Extended (implied / OP) / VM & lt; x> Pointer type to member
/ ZC: arg1 [, arg2] C + + language consistency, where the parameters can be:
forscope - enforce the use of standard C + +
wchar for range rules_ t - wchar_ T is the native type, not typedef
