Question

The atomic numbers of three elements A B and C are 11 17 and 19 respectively. State giving reason which two elements will show similar chemical properties.

Answer 1

11 and 17 will show similar chemical properties as they are on the same period with equal valence shells

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Answer 2

Answer:

A and C

Explanation:

A and C will have similar chemical properties as they have the same valence electrons .

a(2,8,1)

b(2,8,7)

c(2,8,8,1)