Ionic bonding

Front

Define ionic bonding

Back

bonding between non-metal and metal ions as a result of electrostatic forces of attraction between oppositely charged ions

Front

What are ions ? and explain what is meant by cations and anions.

Back

Ions are charged particles.

Positive charged ions are called cations.

Negative charged ions are called anions.

Front

Explain how a metal atom can form a positive charged ion and a non-metal atom can form a negative charged ion

Back

Metal elements (Group I - III) lose their valence electrons to form a positively charged ions.

Non-metal elements (Group IV - VII) gain electrons to their valence shell to form a negatively charged ions.

Front

Explain, in terms of electrons, how a magnesium atom reacts with a sulfur atom to make a magnesium ion and a sulfide ion.

Back

Magnesium atom loses 2 valence electrons to form magnesium ion and sulfur atom gains 2 electrons to make sulfide ion.

Front

Name the ionic compound formed from the following reactions :

i. Sodium + Iodine -->

ii. Lithium + Chlorine -->

iii. Potassium + Bromine -->

iv. Calcium + Carbon -->

Back

i. Sodium iodide

ii. Lithium chloride

iii. Potassium bromide

iv. Calcium carbide

Front

What is the structure of ionic compound ?

Back

Giant lattice structure

Front

What are the three properties of ionic compound ?

Back

1. 1. High m.p. and b.p.

3. 2. Conduct electricity in molten or aqueous state but not in solid state.

5. 3. Soluble in water but not in organic solvent.

Front

Explain, in terms of structure and bonding why calcium hydroxide has a high m.p. and b.p.

Back

Calcium hydroxide has a giant lattice structure and a strong electrostatic force of attraction between its positively charged ions (Ca2+) and negatively charged ions (OH-).

Front

Explain why solid sodium chloride cannot conduct electricity but aqueous sodium chloride can conduct electricity.

Back

In solid sodium chloride, the ions are not free to carry the electricity but in aqueous sodium chloride the ions are free to carry the electricity.