Question

An element 'A' has 2 electrons in its forth shell..
i) its atomic no.
ii) its electronic configuration
iii) its valence
iv) it is a metal or non metal
v) position of the periodic table​

Answer 1

Answer:

B its electronic configuration

Answer 2

Answer:

i) Its atomic number is 20

ii) Its electronic configuration is 2,8,8,2

iii) Its valency is +2

iv) It is a metal

v) It is located in position 20 on periodic table

Explanation:

For your conformation the name of the element 'A' is Calcium

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