Question

Out of elements 34X17 and 40X18, which is chemically more reactive and why​

Answer 1

Explanation:

If an atom's outermost shell is full, it is less inclined to shed or gain an electron from another atom, making it very stable. Conversely, if the outer shell is occupied by just one solitary electron (ie sodium) this electron can readily be shared with another atom, making it highly reactive.

Answer 2

Out of elements 34X17 and 40X18, the element 34X17 is chemically more reactive.

• The element 34X17 and 40X18 contains 17 and 18 electrons respectively.
• The electronic configuration of 34X17 is 1s2,2s2,2p6,3s2,3p5 and the electronic configuration of the element 40X18 is 1s2,2s2,2p6,3s2,3p6.
• The element with 18 electrons has a fully filled outermost shell and in its octet hence will have lesser tendency to either lose or gain electrons than the element with 17 electrons which needs one electron to complete its octet.
• Hence, 34X17 is more reactive than 40X18.