1What change takes place in the atomic size of the group 1 elements as you move from the top of the group to the bottom?
2What change takes place in the number of shells of the group 1 elements as you move down the group?
3What change takes place in the electron giving ability of the group 1 elements as you move down the group?
4Does the valency of the group 1 elements also change as you move down the group, and why?
5What change takes place in the atomic size of the period 3 elements as you move from left to right?
6What change takes place in the number of shells of the period 3 elements as you move from left to right?
7What change takes place in the electron taking ability of the period 3 elements as you move from left to right?
8Does the valency of the period 3 elements also change as you move from left to right, and why?
9What is a group and what is a period? How many of each are there in the modern periodic table?
10Why do the elements that sit in one group have similar chemical properties?
11The electron configuration of sodium is 2,8,1. Work out its group and its period.
12Metallic character falls as you go across a period but rises as you go down a group. Give the reason for these two opposite changes.
13Write the electron configurations of the period 2 elements from lithium to neon and bring out what changes in the outermost shell.