Section Three

Question 1

Solid, liquid, gas , covalent

Answer 1

Not mobile, mobile, do not have ions

Question 2

Covalent does not conduct

Answer 2

Electrons fixed to atoms

Not charged

Question 3

Ionic bonding

Answer 3

Positive + negative ions
Electrostatic attraction of + and - charges
Loss and gain of electrons

Question 4

Covalent networks

Answer 4

Substances-> giant molecules
Made of atoms
Joined by continuos covalent bonding
Diamonds, graphite , silica

Question 5

Metals

Answer 5

Metal ions have freed electrons
Delocalised electrons
“Metal ions in a ‘sea of electrons’”

Question 6

Metallic bond

Answer 6

Metal ions attracted to delocalised electrons

Very strong force

Question 7

Covalent molecules

Answer 7

Compete for electrons
SHARE electrons
Covalent bond= electrons are shared by atoms

Question 8

Molecules

Answer 8

Group of atoms
Bonded together
No bonds to other atoms
Weak forces of attraction

Question 9

Covalent molecules

Answer 9

Exist as separate molecules
Strong bonds in molecules
Weak forces between molecules

Question 10

?-? - - - - - -?-?

Answer 10

Strong covalent bonds

Weak inter molecular attraction

Question 11

Conducting electricity

Answer 11

Must have mobile changed particles
Metals have electrons, not fixed
Will conduct, electrons have charge