Question

An element X, with atomic number Z and mass number A, is represented as ${}_{\mathrm{A}}{}^{\mathrm{Z}}\mathrm{X}$.

• A. True
• B. False

Answer 1

The correct option is B False

The given statement is false.

The correct representation of the symbol of an atom is ${}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{X}$, where X is the symbol of the atom, Z represents the atomic number and A represents the mass number.

Example: The atomic number of Sodium (Na) is 11 and its mass number is 23, So it can be represented as ${}_{11}{}^{23}\mathrm{Na}$.