Question

What is the valency of potassium ion?

Answer 1

Potassium

• It is an alkali metal.
• The atomic number of potassium is $19$.
• The electronic configuration of potassium is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^1$.

Valency of potassium ion

• The combining power (or capacity) of an element is known as its valency.
• Potassium can donate one electron to achieve a stable electronic configuration.
• If potassium donates one electron and becomes a potassium ion, the configuration will be $1s^{2}2s^{2}2p^{6}3s^{2}3p^6$.
• So, the valency of potassium ion is $+1$.