Question

What is valency.........

Answer 1

Answer:

The number of electrons in an atom is always the same as the number of protons, so atoms are electrically neutral over all. Atoms can loss or gain electrons. If an atom gains one or more electrons, it becomes a negativity changed ions

Answer 2

Answer:

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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. ... For example, oxygen has six valence electrons, but its valency is 2. Some elements may have more than one combining power (or valency), while others have just one.

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