Question

11. In which of the following the valency of each of the constituent element is equal to the total number of atoms in one molecule of the compounds?
0/4
HCL

H2s
CaO
MgCl3

Answer 1

Hi there! Here's your correct answer:

Calcium Oxide (CaO)

Answer 2

Answer:

The valency of an element is the number of hydrogen atoms that can combine with or replace (either directly or indirectly) one atom of the element. In other words, the valency of an element is the number of electrons an atom of the element uses to combine with atoms of other elements - it is the combining power of an atom of the element. In an atom, the valence electrons are the electrons that can be used in combining with other atoms - these are the electrons in the orbitals of the outermost shell (also called valence shell).

Explanation:

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