This document discusses simple ions and compound ions. Simple ions are formed from single atoms, such as magnesium Mg2+ and chloride Cl-. Compound ions are formed from groups of joined atoms, such as ammonium NH4+ and carbonate CO32-. Compound ions are also known as polyatomic ions. Some common simple and compound ions and their symbols or formulae are listed. Sodium and potassium ions are used in the body to send electrical signals between nerve cells, and their activity can be measured using an electroencephalograph.

1. Class - 9th
Simple ions and compound ions
Bittu Kumar
Integrated B.Sc. - B.Ed.
School of Education, LPU

2. Simple ions
Those ions which are formed from single atoms are called
simple ions

3. Examples
Magnesium ion Mg2+, Aluminium ion Al3+,
Oxide ion O2–, Chloride ion Cl–
Sodium ion, Na+, is a simple ion because it is
formed from a single sodium atom, Na.

4. Simple ions are
also known as
monoatomic ions.

5. Those ions which are formed from groups of joined
atoms are called compound ions .
COMPOUND IONS

6. For example, ammonium ion NH4+, is a compound ion which
is made up of two types of atoms joined together, nitrogen
and hydrogen. Similarly, carbonate ion CO3 2–, sulphate ion
SO4 2–, nitrate ion NO3– and hydroxide ion OH–, etc., are all
compound ions.

7. Compound ions
are also known
as polyatomic
ions.

8. Some of the common simple ions and compound ions (or polyatomic ions) and their symbols (or
formulae) are

9. Use ?

10. Sodium and potassium are used
in the body in sending electrical
signals by nerve cells.
• EEG (Electro-Encephalo-
Gram)
Graphic record of the electrical
activity in different parts of the
brain produced by a device
called electroencephalograph

11. thanks