Question

What are the elements in the following:

a. 2, 8, 8, 2

b. 2, 8, 18, 3

In a, there are four levels so it must be in the fourth row. The last one is 2, so the second column. and the sum is 20 => Ca.

But in b, four levels as well, the last one is 3 and the sum is 31. 31 is Ga but according to the fourth row and third column, it's Sc (21).

Answer 1

Answer:

1. a

Explanation:

2,8,8,2 answer 2,8,8,2