Question

Answer in one word/a few words.

The simplest form of a pure substance made up of only one kind of atom.

Answer 1

• The simplest form of a pure substance made up of only one kind of atom is an Element.
• Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
• Elements exist in their simplest form and cannot be broken down further. So, elements can exist in the form of ions, atoms, isotopes, and molecules.

Examples of some commonly used elements along with their chemical symbols:

Name of the element	Chemical symbol
$\mathrm{Hydrogen}$	$\mathrm{H}$
$\mathrm{Boron}$	$\mathrm{B}$
$\mathrm{Carbon}$	$\mathrm{C}$
$\mathrm{Silicon}$	$\mathrm{Si}$
$\mathrm{Sodium}$	$\mathrm{Na}$
$\mathrm{Lead}$	$\mathrm{Pb}$
$\mathrm{Platinum}$	$\mathrm{Pt}$