Question

Определить валентность в бинарных соединениях CaO, SiO2 , CuO , Cu2O , FeO, Fe2O3, SiH4, CrO3, H2S, CO2, CO, SO3, SO2, HCl, HBr, Cl2O5, Cl2O7, РН3, K2O, Al2O3, P2O5, NO2, N2O5, Cr2O3, SiO2, B2O3, SiH4, Mn2O7, MnСI2, N2O3.

Answer 1

1)2 и 2
2)4 и 2
3)2 и 2
4)1 и 2
5)2 и 2
6)3 и 2
7)4 и 1
8)6 и 2
9)1 и 2
10)4 и 2
11)2 и 2
12)6 и 2
13)4 и 2
14)1 и 1
15)1 и 1
16) 5 и 2
17)7 и 2
18)3 и 1
19)1 и 2
20)3 и 2
21)5 и 2
22)4 и 2
23)5 и 2
24)3 и 2
25)4 и 2
26)3 и 2
27) 4 и 1
28)7 и 2
29)2 и 1
30)3 и 2
Так сойдёт?

Answer 2

Valence of Binary Compounds

The valence of an element in a binary compound refers to the number of electrons that an atom of that element can gain, lose, or share when it forms a chemical bond with another element. The valence of an element determines its ability to combine with other elements and form compounds.

Here are the valences of the given binary compounds:

- CaO: Calcium oxide (CaO) is an ionic compound. Calcium (Ca) has a valence of +2, while oxygen (O) has a valence of -2. Therefore, the valence of CaO is +2 for calcium and -2 for oxygen.

- SiO2: Silicon dioxide (SiO2) is a covalent compound. Silicon (Si) has a valence of +4, while oxygen (O) has a valence of -2. Therefore, the valence of SiO2 is +4 for silicon and -2 for each oxygen atom.

- CuO: Copper(II) oxide (CuO) is an ionic compound. Copper (Cu) has a valence of +2, while oxygen (O) has a valence of -2. Therefore, the valence of CuO is +2 for copper and -2 for oxygen.

- Cu2O: Copper(I) oxide (Cu2O) is an ionic compound. Copper (Cu) has a valence of +1 in this compound. Therefore, the valence of Cu2O is +1 for each copper atom and -2 for each oxygen atom.

- FeO: Iron(II) oxide (FeO) is an ionic compound. Iron (Fe) has a valence of +2, while oxygen (O) has a valence of -2. Therefore, the valence of FeO is +2 for iron and -2 for oxygen.

- Fe2O3: Iron(III) oxide (Fe2O3) is an ionic compound. Iron (Fe) has a valence of +3, while oxygen (O) has a valence of -2. Therefore, the valence of Fe2O3 is +3 for each iron atom and -2 for each oxygen atom.

- SiH4: Silicon tetrahydride (SiH4) is a covalent compound. Silicon (Si) has a valence of +4, while hydrogen (H) has a valence of +1. Therefore, the valence of SiH4 is +4 for silicon and +1 for each hydrogen atom.

- CrO3: Chromium trioxide (CrO3) is an ionic compound. Chromium (Cr) has a valence of +6, while oxygen (O) has a valence of -2. Therefore, the valence of CrO3 is +6 for chromium and -2 for each oxygen atom.

- H2S: Hydrogen sulfide (H2S) is a covalent compound. Hydrogen (H) has a valence of +1, while sulfur (S) has a valence of -2. Therefore, the valence of H2S is +1 for each hydrogen atom and -2 for sulfur.

- CO2: Carbon dioxide (CO2) is a covalent compound. Carbon (C) has a valence of +4, while oxygen (O) has a valence of -2. Therefore, the valence of CO2 is +4 for carbon and -2 for each oxygen atom.

- CO: Carbon monoxide (CO) is a covalent compound. Carbon (C) has a valence of +2, while oxygen (O) has a valence of -2. Therefore, the valence of CO is +2 for carbon and -2 for oxygen.

- SO3: Sulfur trioxide (SO3) is a covalent compound. Sulfur (S) has a valence of +6, while oxygen (O) has a valence of -2. Therefore, the valence of SO3 is +6 for sulfur and -2 for each oxygen atom.

- SO2: Sulfur dioxide (SO2) is a covalent compound. Sulfur (S) has a valence of +4, while oxygen (O) has a valence of -2. Therefore, the valence of SO2 is +4 for sulfur and -2 for each oxygen atom.

- HCl: Hydrogen chloride (HCl) is a covalent compound. Hydrogen (H) has a valence of +1, while chlorine (Cl) has a valence of -1. Therefore, the valence of HCl is +1 for hydrogen and -1 for chlorine.

- HBr: Hydrogen bromide (HBr) is a covalent compound. Hydrogen (H) has a valence of +1, while bromine (Br) has a valence of -1. Therefore, the valence of HBr is +1 for hydrogen and -1 for bromine.

- Cl2O5: Dichlorine pentoxide (Cl2O5) is a covalent compound. Chlorine (Cl) has a valence of -1, while oxygen (O) has a valence of -2. Therefore, the valence of Cl2O5 is -1 for each chlorine atom and -2 for each oxygen atom.

- Cl2O7: Dichlorine heptoxide (Cl2O7) is a covalent compound. Chlorine (Cl) has a valence of -1, while oxygen (O) has a valence of -2. Therefore, the valence of Cl2O7 is -1 for each chlorine atom and -2 for each oxygen atom.

- PH3: Phosphine (PH3) is a covalent compound. Phosphorus (P) has a valence of +3, while hydrogen (H) has a valence of +1. Therefore, the valence of PH3 is +3 for phosphorus and +1 for each hydrogen atom.

- K2O: Potassium oxide (K2O) is an ionic compound. Potassium (K) has a valence of +1, while oxygen (O) has a valence of -2. Therefore, the valence of K2O is +1 for each potassium atom and -2 for each oxygen atom.

- Al2O3: Aluminum oxide (Al2O3) is an ionic compound. Aluminum (Al) has a valence of +3, while oxygen (O) has a valence of -2. Therefore, the valence of Al2O3 is +3 for each aluminum atom and -2 for each oxygen atom.

- P2O5: Diphosphorus pentoxide (P2O5) is a covalent compound. Phosphorus (P) has a valence of +5, while oxygen (O) has a valence of -2. Therefore, the valence of P2O5 is +5 for each phosphorus atom and -2 for each oxygen atom.

- NO2: Nitrogen dioxide (NO2) is a covalent compound. Nitrogen (N) has a valence of +4, while oxygen (O) has a valence of -2. Therefore, the valence of NO2 is +4 for nitrogen and -2 for each oxygen atom.

- N2O5: Dinitrogen pentoxide (N2O5) is a covalent compound. Nitrogen (N) has a valence of +5, while oxygen (O) has a valence of -2. Therefore, the valence of N2O5 is +5 for each nitrogen atom and -2 for each oxygen atom.

- Cr2O3: Chromium(III) oxide (Cr2O3) is an ionic compound. Chromium (Cr) has a valence of +3, while oxygen (O) has a valence of -2. Therefore, the valence of Cr2O3 is +3 for each chromium atom and -2 for each oxygen atom.

- B2O3: Boron oxide (B2O3) is a covalent compound. Boron (B) has a valence of +3, while oxygen (O) has a valence of -2. Therefore, the valence of B2O3 is +3 for each boron atom and -2 for each oxygen atom.

- SiH4: Silicon tetrahydride (SiH4) is a covalent compound. Silicon (Si) has a valence of +4, while hydrogen (H) has a valence of +1. Therefore, the valence of SiH4 is +4 for silicon and +1 for each hydrogen atom.

- Mn2O7: Manganese(VII) oxide (Mn2O7) is an ionic compound. Manganese (Mn) has a valence of +7, while oxygen (O) has a valence of -2. Therefore, the valence of Mn2O7 is +7 for each manganese atom and -2 for each oxygen atom.

- MnCl2: Manganese(II) chloride (MnCl2) is an ionic compound. Manganese (Mn) has a valence of +2, while chlorine (Cl) has a valence of -1. Therefore, the valence of MnCl2 is +2 for manganese and -1 for each chlorine atom.

- N2O3: Dinitrogen trioxide (N2O3) is a covalent compound. Nit