chap6: chemical bonding

Question 1

what are elements in group0 called?

Answer 1

noble gas

Question 2

what are noble gas?

Answer 2

noble gas are monoatomic unreactive because have fully filled outer shells and very stable because they achieved an octet or duplet electronic configuration

Question 3

types of ions

Answer 3

cation (positive ions)
anions (negative ions)

Question 4

ionic bonding

Answer 4

transfer of ions from metal to non-metal to achienve noble gas structure

Question 5

how to name ionic compound

Answer 5

the name end with ide eg. sodium chloride

Question 6

physical properties of ionic compounds

Answer 6

high melting point and boiling point because of strong electrostatic forces

soluble in water and insoluble in organic solvents

conduct electricity when molten or aqueous state (free moving ions)
do not conduct electricity in solid state

Question 7

covalent bonding

Answer 7

sharing ions from non-metal to non-metal

Question 8

physical properties of covalent compound

Answer 8

low melting point and boiling point because of weak intermolecular forces

insoluble in water and soluble in organic solvent

do not conduct electricity in any states because do not have free moving ions

Question 9

explain why ionic compound have high mp/bp

Answer 9

a lot of energy is required as there is a strong electrostatic forces of attraction between the ions

Question 10

explain why covelent compound have low mp/bp

Answer 10

less energy is required as there is weak intermolecular forces of attraction