Question

Which of the following are likely to form a covalent bond? A) gold and gold. B) oxygen and oxygen. C) magnesium and oxygen. D) magnesium and gold

Answer 1

B) oxygen and oxygen.

Step-by-step explanation:

There are 2 broadly types of chemical bonds present:

1. Covalent bond: This bond is present when there is sharing of electrons between two elements.

2. Ionic bond: This type of bond is formed when there is a complete transfer of electrons from one element to another element. In this bonding one element is always a metal and another is a non-metal.

We are given that two oxygen atoms are forming bonds. Oxygen is a non-metal and hence, the bond between them will be purely covalent in nature.

Hence, Answer - B) oxygen and oxygen.

Bonds between gold-gold and magnesium gold will be metallic bond and the bond between magnesium-oxygen is ionic bond.

Answer 2

Covalent bonds exists between non -metals acting as both anion and cation. In this type of bond, the valence electrons are shared between the atoms. Among the choices, covalent bonds exist in B) oxygen and oxygen. This is a non-polar covalent compound because of the equal sharing of valence electrons.