Question

Q.The element with atomic number 56 us likely to have the same outer shell configuration as the element with, atomic number.
a) 12 b) 18
c) 14 d)20

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Answer 1

Answer:

I think about 18

Explanation:

no. of elements =2n raise to power2

Answer 2

Answer:

b) 18

Explanation:

As the Outer most shell of barium and argon contains same no. of electon