Question

Назовите элементы, являющиеся в следующих соединениях: одновалентными, двухвалентными, трехвалентными, четырехвалентными, пятивалентными: Na2O, HCl, Cl2O5, PH3, Fe2O3, MgO, ZnO, CO2, P2O5, CaO

Answer 1

I - Na, H, Cl, 
II -O, Mg, Zn, Ca
III -P, Fe, 
IV - C, 
V - Cl, P

Answer 2

Na,H,Cl одновал.
О,Mg,Zn,Ca двухвал.
Fe,P трех
С четырех
Cl,P пяти
у разных атомов могут быть несколько валентностей

Answer 3

Elements and Their Valency in Various Compounds

Na2O: - Sodium (Na) is a one-valent element. - Oxygen (O) is a two-valent element.

HCl: - Hydrogen (H) is a one-valent element. - Chlorine (Cl) is a one-valent element.

Cl2O5: - Chlorine (Cl) is a one-valent element. - Oxygen (O) is a two-valent element.

PH3: - Phosphorus (P) is a three-valent element. - Hydrogen (H) is a one-valent element.

Fe2O3: - Iron (Fe) is a two-valent element. - Oxygen (O) is a two-valent element.

MgO: - Magnesium (Mg) is a two-valent element. - Oxygen (O) is a two-valent element.

ZnO: - Zinc (Zn) is a two-valent element. - Oxygen (O) is a two-valent element.

CO2: - Carbon (C) is a four-valent element. - Oxygen (O) is a two-valent element.

P2O5: - Phosphorus (P) is a three-valent element. - Oxygen (O) is a two-valent element.

CaO: - Calcium (Ca) is a two-valent element. - Oxygen (O) is a two-valent element.