Formula and charges of ions

Question 1

What is the formula of iron (III)?

Answer 1

Fe3+

Question 2

What is the formula of aluminium?

Answer 2

Al3+

Question 3

What is the formula of iron (II)?

Answer 3

Fe2+

Question 4

What is the formula of magnesium?

Answer 4

Mg2+

Question 5

What is the formula of sodium?

Answer 5

Na+

Question 6

What is the formula of calcium?

Answer 6

Ca2+

Question 7

What is the formula of silver?

Answer 7

Ag+

Question 8

What is the formula of zinc?

Answer 8

Zn2+

Question 9

What is the formula of sulfide?

Answer 9

S2-

Question 10

What is the formula of chloride?

Answer 10

Cl-

Question 11

What is the formula of nitride?

Answer 11

N3-

Question 12

What is the formula of oxide?

Answer 12

O2-

Question 13

What is the formula of fluoride?

Answer 13

F-

Question 14

What is the formula of iodide?

Answer 14

I-

Question 15

What is the formula of ammonium?

Answer 15

NH4+

Question 16

What is the formula of ammonia?

Answer 16

NH3

Question 17

What is the formula of hydroxide?

Answer 17

OH-

Question 18

What is the formula of nitrate (V)?

Answer 18

NO3 -

Question 19

What is the formula of carbonate?

Answer 19

CO3 2-

Question 20

What is the formula of sulfate (VI)?

Answer 20

SO4 2-

Question 21

What is the formula of nitrite or nitrate (III)?

Answer 21

NO2 -

Question 22

What is the formula of hydrogen carbonate?

Answer 22

HCO3 -

Question 23

What is the formula of manganate (VII)?

Answer 23

MnO4 -

Question 24

What is the formula of sulfite or sulfate (IV)?

Answer 24

SO3 2-

Question 25

What is the formula of dichromate?

Answer 25

Cr2O7 2-

Question 26

What is the formula of phosphate?

Answer 26

PO4 3-