Question

oxidation is defined as: a the loss of electrons and an increase in oxidation number b the gain of electrons and an increase in oxidation number c the gain of electrons and a decrease in oxidation number d the loss of electrons and a decrease in oxidation number

Explanation:

Oxidation is a process where a substance loses electrons. When electrons are lost, the oxidation number of the element increases. For example, in the reaction \(Na
ightarrow Na^{+}+e^{-}\), sodium (Na) loses an electron and its oxidation number changes from \(0\) (in \(Na\)) to \(+ 1\) (in \(Na^{+}\)).

Answer:

A. the loss of electrons and an increase in oxidation number