The elements of one short of the periodic table are given below in order from left to right:

Place the three elements fluorine, beryllium, and nitrogen in the order of increasing electronegativity.

The elements of one short of the periodic table are given below in order from left to right:

$\mathrm{Li}, \mathrm{Be}, \mathrm{B}, \mathrm{C}, \mathrm{O}, \mathrm{F}, \mathrm{Ne}.$

Which one of the above elements belongs to the halogen series?

With reference to the variation of properties in the Periodic Table, comment on the following statement.

Atomic size increases from left to right across a period.

With reference to the variation of properties in the Periodic Table, comment on the following statement.

Ionisation potential increases from left to right across a period.

With reference to the variation of properties in the Periodic Table, comment on the following statement.

Electron affinity increases going down a group.

With reference to the variation of properties in the Periodic Table, comment on the following statement.

Electronegativity increases going down a group.