2.1.2 Compounds, Formulas and Equations

Question 1

what charge do group 1 metals all have?

Answer 1

1+

Question 2

what charge do group 3 metals all have?

Answer 2

3+

Question 3

what charge can group 5 sometimes have?

Answer 3

3-

Question 4

what charge do group 7 non-metals often have?

Answer 4

1-

Question 5

what charge do group 6 non-metals often have?

Answer 5

2-

Question 6

what charge do group 2 metals all have?

Answer 6

2+

Question 7

ammonium

Answer 7

NH4 (+)

Question 8

hydroxide

Answer 8

OH (-)

Question 9

carbonate

Answer 9

CO3 (2-)

Question 10

nitrate

Answer 10

NO3 (-)

Question 11

sulfate

Answer 11

SO4 (2-)

Question 12

nitrite

Answer 12

NO2 (-)

Question 13

sulfite

Answer 13

SO3 (2-)

Question 14

hydrogen carbonate

Answer 14

HCO3 (-)

Question 15

dichromate

Answer 15

Cr2O7 (2-)

Question 16

manganate

Answer 16

MnO4 (-)

Question 17

phosphate

Answer 17

PO4 (3-)

Question 18

what do you do to the ions to make chemical formulae?

Answer 18

“swap the numbers over”

Question 19

what should you beware of when writing symbol equations?

Answer 19

diatoms

Question 20

state the pneumonic to remember the diatoms

Answer 20

Have 
No
Fear 
Of 
Ice 
Cold 
Beer

Question 21

what does aqueous mean?

Answer 21

anything dissolved in water

Question 22

H2, 02, N2, Cl2 are all in what state?

Answer 22

gas

Question 23

all metals apart from what are solid

Answer 23

mercury

Question 24

most ionic substances found in water are what?

Answer 24

aqueous

Question 25

HCL, H2SO4, HNO3, H3PO4 are all what state?

Answer 25

aqueous