The following represents a period in the periodic table with hypothetical symbols of elements:

Group	$1$	$2$	$13$	$14$	$15$	$16$	$17$	$18$
Element	$\mathrm{A}$	$\mathrm{B}$	$\mathrm{C}$	$\mathrm{D}$	$\mathrm{E}$	$\mathrm{F}$	$\mathrm{G}$	$\mathrm{I}$

Which is the most inactive element?

The following represents a period in the periodic table with hypothetical symbols of elements:

Which element has the strongest metallic character?

The following represents a period in the periodic table with hypothetical symbols of elements:

Arrange the elements $\mathrm{C}, \mathrm{D}, \mathrm{E}$ and $\mathrm{F}$ in the decreasing order of their atomic radii.

The position of three elements $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the periodic table is given below:

State whether $\mathrm{Z}$ is a metal or a non-metal.

The position of three elements $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the periodic table is given below:

Will $\mathrm{Z}$ be larger or smaller than $\mathrm{Y}$?

The position of three elements $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the periodic table is given below:

Which type of ion, cation or anion will be formed by the element $\mathrm{Z}$?

The position of three elements $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the periodic table is given below:

Will $\mathrm{Z}$ have smaller or larger ionisation energy than $\mathrm{Y}$?

A part of the periodic table is given below. The elements lithium, carbon, sulphur and argon have been placed in their correct position. The positions of the other elements are represented by hypothetical letters.

With reference to this table, answer the following:

Which of these has the smallest radius?

A part of the periodic table is given below. The elements lithium, carbon, sulphur and argon have been placed in their correct position. The positions of the other elements are represented by hypothetical letters.

With reference to this table, answer the following:

Which of these has the electronic configuration $2, 8, 4$?