CSEC Chemistry · January 2019 · Paper 1 · Question Q9
An element, X, has an electronic configuration 2, 8, 1. At which of the following positions is the element in the periodic table?
- (A)Period 1 Group I
- (B)Period 1 Group II
- (C)Period 3 Group I
- (D)Period 3 Group II
The answer is shown once you've answered.
Practise this question