4.3.1. Name of the group: The group VII elements are known as "Halogens."
4.3.2. Normal valency: The normal valency of halogens is 1. This means that they typically form bonds by gaining one electron to achieve a complete octet in their outer shell, resembling the electron configuration of a noble gas.
4.3.3. Number of valence electrons: Halogens have seven valence electrons. Their general electron configuration for the outer shell is ns^2np^5, where n is the period or energy level number.
4.3.4. Chemical equation that shows the formation of element Q ion: Assuming element Q is a halogen, the chemical equation for the formation of its anion (in other words, gaining an electron) would be:
Q + e⁻ → Q⁻
This shows the halogen atom (Q) gaining one electron (e⁻) to form a negatively charged ion (Q⁻). Since halogens have seven valence electrons, the addition of one more electron fills their valence shell, resulting in a stable anion with a 1- charge.
