School of Elements

Q1. A. Fill in the blanks.

The formula of chloride of metal M is $\text{MCl}_2$. The metal M belongs to group 2.

$\text{18}^{\text{th}}$ group in the periodic table contains elements that are all gases at room temperature.

The arrangement of elements in a group of three is known as -triads.

The law used by Newlands to arrange elements is known as Newlands' Octaves.

The element eka – aluminum in Mendeleev's periodic table is known as Gallium in modern periodic table.

Elements showing properties of both metals and non – metals are known as metalloids.