Explain the existence of elements in various form

Matter

8.1

Matter

Definition

Atom: the smallest particle of an element

Molecule: consists of two or more atoms which chemically combined

Ion: charged particle

Type of substances

Type of substances	Explanation and example
Atomic substances	Contain only atoms Atoms in metals arranged in neat and orderly manner Examples Gold metal Helium atom
Molecule substances	Contain molecules made up of two or more atom that combined chemically Atom can be same or different Examples Non-metallic elements Water molecules
Ionic substances	Formed by the reaction between metal elements and non-metal elements Positive ions and negative ions Examples Sodium chloride

8.1

Matter

Definition

Atom: the smallest particle of an element

Molecule: consists of two or more atoms which chemically combined

Ion: charged particle

Type of substances

Type of substances	Explanation and example
Atomic substances	Contain only atoms Atoms in metals arranged in neat and orderly manner Examples Gold metal Helium atom
Molecule substances	Contain molecules made up of two or more atom that combined chemically Atom can be same or different Examples Non-metallic elements Water molecules
Ionic substances	Formed by the reaction between metal elements and non-metal elements Positive ions and negative ions Examples Sodium chloride