Question

An element A has 2 electrons in third shell state:
(i) its valency,
(ii) postion in period table ,
(iii)its is a metal or non metal
(iv) its atomic number ​

Answer 1

Answer:

option 2.

Explanation:

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Answer 2

Answer:

Calcium. It's atomic no. is 20. It's position in periodic table is group 2 and period 4.It is a metal. The name assigned to this group is alkaline earth metals

Explanation: