Question

An element $X$ lies in the third period and group $17$. Find out,

nature - metallic or nonmetallic

Answer 1

Nature of an element X

• An element having electrons less than $4$ can lose electrons and complete their octet and forms a positively charged ion. This property is known as metallic character.
• An element having electrons more than $4$ can gain electrons and complete their octet and forms a negatively charged ion. This property is known as non-metallic character.
• As the element $\mathrm{X}$ belongs to group $17$, the electronic configuration is 1s²2s ² 2p ⁵ then there are $7$ electrons in its valence shell.
• The number of valence electron in element $X$ is $7$, it requires only one electron to attain its octet.
• Thus the element $\mathrm{X}$ shows a non-metallic character.