Fill in the blanks

1. Halogens belong to group ……… of the Periodic Table.

2. An element having electronic configuration (2, 8, 2) belongs to the ……… group.

3. Atoms of different elements with the same number of occupied shells are placed in the same ……… .

4. Valency of elements ……… and then ……… as we move across the period while it remains the same down the group.

5. Non-metals are located on the ……… side of the Periodic Table.