Explain the following properties of chlorides of period 3 elements.

Melting and boiling points

Which of the following elements are alkaline earth metals?

I. $\mathrm{Rb}$   II. $\mathrm{Sr}$   III. $\mathrm{Ba}$

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Which of the following elements can be classified as metalloids?

I. $\mathrm{Al}$    II. $\mathrm{Si}$    III. $\mathrm{Te}$

Explain the following properties of chlorides of period 3 elements.

Electrical conductivity

Explain the following properties of chlorides of period 3 elements.

Ionic and covalent character