Question

Arrange the following elements as per the guidelines in brackets.

1. Li, F. Be, N (in decreasing order of atomic size)

2. Ca, Be, Mg. (in increasing order of number of shells)

3. Na, Ci, Si, S (in increasing order of electron affinity)​

Answer 1

Answer:

1.f, n, be, li

2.be, mg, ca

3.na , ci, s, si