LIFE SCIENCE

Detailed explanation-1: -Over 100 different kinds of atoms are known; each kind is an element. All the atoms of a particular element are alike chemically but can vary slightly in mass and other physical properties. Atoms of different elements have different masses.

Detailed explanation-2: -Small, Smaller, Smallest. Everything is made of atoms, but not all atoms are identical. In fact, there are over 100 kinds of atoms. About 92 of them occur naturally, and the others have been made by scientists in the laboratory.

Detailed explanation-3: -There are over 100 different types of atoms, called chemical elements. Each type has the same basic structure, but a different number of parts.

Detailed explanation-4: -ISOTOPES AND ATOMIC MASSES For many of the chemical elements there are several known isotopes. Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.

Detailed explanation-5: -An element is a substance made up of a single type of atom. It can’t be broken into simpler components by chemical processes. There are 92 naturally occurring elements. They may be solids, liquids, or gases.