Formulae

Question 1

Monatomic Elements

Answer 1

Noble gases (He, Ne, Ar, Kr, Xe, Rn)

Question 2

Simple molecular

Answer 2

Diatomic molecules, P4, S8

Question 3

Diatomic molecules

Answer 3

NOF and down (N2, O2, F2, Cl2, Br2, I2, H2)

Question 4

Ionic elements

Answer 4

There are no iconic elements!

Question 5

Metallic elements

Answer 5

Formula is just symbol

Question 6

Giant covalent elements

Answer 6

Formula is symbol (diamond/graphite : C, silicon Si)

Question 7

Monatomic compounds

Answer 7

There are none!!!

Question 8

Simple molecular: sulfur

Answer 8

SO2: Sulfur dioxide
SO3: sulfur trioxide

Question 9

Simple molecular: carbon

Answer 9

CO - carbon monoxide
CO2 - carbon dioxide

Question 10

Simple molecular: Nitrogen

Answer 10

NO - Nitrogen monoxide
NO2 - nitrogen dioxide

Question 11

Simple molecular: other

Answer 11

NH3 ammonia
CH4 methane
H2S hydrogen sulfide

Question 12

Compounds: Ionic

Answer 12

Have to be worked out from charges (crossing)

Question 13

Hydrochloric Acid

Answer 13

HCl

Question 14

Sulfuric Acid

Answer 14

H2SO4

Question 15

Nitric acid

Answer 15

HNO3

Question 16

Phosphoric acid

Answer 16

H3PO4

Question 17

Metallic compounds

Answer 17

There are none!!!

Question 18

Giant covalent compound

Answer 18

SiO2 - Silicon dioxide

Question 19

Positive ions: Group 1

Answer 19

Li+ lithium
Na+ sodium
K+ potassium

Question 20

Positive ions: group 2

Answer 20

Mg2+ magnesium
Ca2+ calcium
Ba2+ barium

Question 21

Positive ions: other

Answer 21

Al3+ Aluminium
Zn2+ Zinc
Ag+ Silver
NH4+ Ammonium
H+ Hydrogen

Question 22

Negative ions: Group 7

Answer 22

F- Fluoride
Cl- Chloride
Br- Bromide
I- Iodide

Question 23

Negative ions: Group 6

Answer 23

O2- Oxide
S2- Sulfide

Question 24

Negative Ions: Other

Answer 24

NO3- Nitrate
SO4-2 Sulfate
H- Hydride
OH- Hydroxide
HCO3- Hydrogencarbonate
PO4-3 Phosphate