Question

What is the Valency of Magnesium with Atomic Number 12?

Answer 1

Valency:

• “Valency is the combining capacity of an atom.”
• “The electrons present in the outermost shell of an atom are known as the valence electrons.”

The Valency of Magnesium with Atomic Number $12$:

• Magnesium's electronic configuration is $(2,8,2)$.
• We are aware that every atom strives to adopt the noble gases' stable electrical structure.
• Noble gases are arranged in a configuration of form ${\mathrm{ns}}^2{\mathrm{np}}^6$.
• Either exchanging electrons or losing electrons results in this situation.
• To adopt the structure of its neighboring noble gas, neon, magnesium loses two electrons from the outermost $3\mathrm{s}$ shell.
• We are all aware that an atom's valency is determined by the number of its outermost electrons.
• It describes the atom's propensity for combining.
• Magnesium, therefore, has a valency of two.