Question

The loss of one or more electrons from an atom is called

Answer 1

Answer: a. oxidation

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

$X\rightarrow X^{n+}+ne^-$

Electrochemistry is the branch of science which deals with the interconversion of electrical and chemical changes in the systems.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

$X^{n+}+ne^-\rightarrow X$

Half reaction is a reaction of oxidation or reduction occurring in anodic half or cathodic half of the cell. It could be oxidation or reduction.

Answer 2

Loss of an electron is oxidation!