Question

Выписать элементы имеющие постоянную валентность равную 2 Ca Na O S Ba Fe

Answer 1

Са, О, Ва имеет валентность 2 

Answer 2

Elements with Constant Valency of 2

The elements with a constant valency of 2 include:

- Ca (Calcium) - Na (Sodium) - O (Oxygen) - S (Sulfur) - Ba (Barium) - Fe (Iron)

These elements maintain a valency of 2 in their chemical compounds.

(#1)(#5)

Is there anything else you would like to know about these elements or any other topic?