Question

Name the second last element of the period 3.
How many elements are there in the second period.
Name the element which has the highest electron affinity.
Name the element which has the highest electronegativity.
Name the element which may be placed on group 1 but is not a metal.

Answer 1

last one is hydrogen
yes

Answer 2

Period 3 - Chlorine
Period 2-8 elements
Electron affinity-Chlorine
Electronegativity-Flourine
Hydrogen