Elements 1 - a chemical substance composed of atoms of two or more different types of atoms 2- substances that are made up of only one type of atom 3- subatomic particles with a positive charge 4- only found on earth

Substances that are made up of only one type of atom.

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.