Question

An element has its electronic configuration as (2.8,2).
a) What is the atomic number of this elements?
b) What is the group and period of this element?
c) Valency of element​

Answer 1

Answer:

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.

Answer 2

Answer:

a) 12

c) 2

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