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.
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.
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
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Today we are going to discuss ions
/ /Similarly/ /Etc. all are the simple ion
You might be wondering where these ions are used
.
Sodium and potassium are used in the body in sending electrical signals by nerve cells.
By measuring brain waves (caused by nerve impulses due to the movement of sodium ions and
potassium ions in brain cells), doctors can tell whether there is any ailment (injury, etc.) in the brain
of a person. This is done by taking an EEG (Electro-Encephalo-Gram) of the brain which shows a
graphic record of the electrical activity in different parts of the brain produced by a device called
electroencephalograph (by attaching electrodes to the person’s scalp as shown in the above photograph).
