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Anonymous users2024-02-06There are also the following groups of isoelectrons that are common in high school:
CO2, SCN-, NO2+, and N3- have the same general formula, and the total number of valence electrons is 16, and all are linear structures.
CO3 2-, NO3-, SO3 2- have the same general formula and all have a valence electron number of 24 and all have a planar triangular structure.
SO2, O3, NO2- have the same general formula, and the total valence electron number is 18, all of which are planar V-shaped structures.
SO4 2- and PO4 3- have the same general formula, and the total valence electron number is 32, both of which are tetrahedral structures.
Po3 3-, SO3 2-, Clo3- have the same general formula, the total valence electron number is 26, and all are trigonal pyramidal structures.
Particles with a total number of 2 electrons outside the nucleus: HE, H-, Li+, BE2-
Particles with a total of 10 electrons outside the nucleus: NE, HF, H2O, NH3, CH4 (molecular class).
Na+, Mg2+, Al3+, NH4+, H3O+ (cationic).
N3-, O2-, F-, Oh-, NH2- (anions).
Particles with the same total number of electrons and protons outside the nucleus:
Na+, NH4+, H3O+ (11 protons, 10 electrons).
f-, oh-, nh2- (9 protons, 10 electrons).
Cl-, Hs- (17 protons, 18 electrons).
N2, Co, C2H2, RNC (14 protons, 14 electrons).
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Anonymous users2024-02-05Definitely not, that's two different things entirely.
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Anonymous users2024-02-04It can be prepared by mixing aluminum fluoride with sodium carbonate and melting it at high temperature. The by-product is cryolite. Equation:
4Alf3+3Na2CO3=High temperature=2Na3[Alf6]+Al2(CO3)3 Pay attention to control the temperature to prevent the decomposition of aluminum carbonate. When the aluminium carbonate is precipitated from the mixture in solid form, it is filtered to obtain a relatively pure aluminium carbonate. This process is strictly waterproof to prevent hydrolysis of aluminum carbonate.
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Anonymous users2024-02-03You're talking about chemical formulas, right? nacl
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Anonymous users2024-02-02The chemical formula of water vapor is H2O and is made up of the elements H and O.
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Anonymous users2024-02-01It should volatilize into small molecules, but not necessarily in an elemental state.
At present, there is no awesome polymer that can withstand such a high temperature without degradation, after degradation, the polymer will become small molecules, molecular chain fragments, etc., whether it can be further decomposed into elemental vibrillin depends on the hole or external conditions at high temperature. f is too reactive to be present in other molecular forms.
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