Working Out Formulae

Question 1

What does it mean if a compound name ends with ide?

Answer 1

It has only 2 elements combined

Question 2

What two compound name endings show the compound has oxygen in it?

Answer 2

Ite, ate

Question 3

What is the difference between ite and ate?

Answer 3

Ite shows a compound has a low oxygen content, and ate a high

Question 4

What is the symbol for ammonium?

Answer 4

NH4

+ charge

Question 5

What are the symbols for nitrite and nitrate?

Answer 5

Nitrite - NO2
Nitrate - NO3
Both have a - charge

Question 6

What is the symbol for hydroxide?

Answer 6

OH

- charge

Question 7

What are the symbols for sulphite and sulphate?

Answer 7

sulphite - SO3
sulphate - SO4
both 2- charge

Question 8

What is the symbol for carbonate?

Answer 8

CO3

2- charge

Question 9

What is the symbol for phosphate?

Answer 9

PO4

3- charge

Question 10

What ending elements have a 2- charge?

Answer 10

Sulphite, sulphate, carbonate

Question 11

What ending elements have a - charge?

Answer 11

Hydroxide, nitrite, nitrate

Question 12

What element endings have a + charge?

Answer 12

Ammonium

Question 13

What element endings have a 3- charge?

Answer 13

Phosphate

Question 14

What is the formula for magnesium Hydroxide?

Answer 14

Mg(OH)2

Question 15

What is the formula for calcium phosphate?

Answer 15

Ca3(PO4)2