Question

Укажите значение валентности первого элемента в соединении Mn₂O₇ , Ca₃N₂ ,

Answer 1

Ответ:

Mn₂O₇  марганец +7

Ca₃N₂  кальций +2

Answer 2

Ответ:

У оксигена почти всегда -2, след. у Mn: +7

у кальция всегда +2

Answer 3

Valency of the First Element in Mn₂O₇ and Ca₃N₂

The valency of an element is the combining power of an element, which determines how many other atoms it can combine with. Let's explore the valency of the first element in the compounds Mn₂O₇ and Ca₃N₂.

Mn₂O₇: The first element in Mn₂O₇ is manganese (Mn). Manganese can exhibit multiple oxidation states, and in Mn₂O₇, it has a valency of +7.

Ca₃N₂: The first element in Ca₃N₂ is calcium (Ca). Calcium typically exhibits a valency of +2 in compounds.

In the case of nitrogen (N) in Ca₃N₂, nitrogen usually has a valency of -3 in compounds.