Question

The atom of an element has 9 protons, 9 electrons, and 10 neutrons. Predict the valency of the element.

Answer 1

• Valency: It is defined as the combining capacity of the atom of an element with other atoms of the elements to achieve a stable configuration or complete its octet by the gain or loss of electrons.
• The given element has 9 electrons in the atom. Therefore, the electronic configuration is 2, 7.
• The given element has 7 electrons in its outermost or valence shell. in order to complete its octet, it will gain 1 electron to achieve a stable noble gas configuration.

Therefore, the valency of the given element is 1.