Chemical Formulae and equations flashcards

What is valency

The number of bonds an atom can make

How can we find the valency/charge

By looking at its group in the periodic table

Valency of an atom in group 1

1

Valency of an atom in group 2

2

Valency of an atom in group 3

3

Valency of an atom in group 4

4

Valency of an atom in group 5

3

Valency of an atom in group 6

2

Valency of an atom in group 7

1

Valency of an atom in group 8

0

Charge of an atom in group 1

+1

Charge of an atom in group 2

+2

Charge of an atom in group 3

+3

Charge of an atom in group 5

-3

Charge of an atom in group 6

-2

Charge of an atom in group 7

-1

What does the prefix mono mean 

1

What does the prefix di mean 

2

What does the prefix tri mean 

3

What does the prefix tetra mean 

4

What does the prefix penta mean 

5

What does the prefix hexa mean

6

What is the formula for the following compounds?

a) Carbon tetrafluoride 

b) Dinitrogen tetroxide 

c) Phosphorus pentachloride 

a) CF₄

b) N₂O₄

c) PCl₅

How do we find out the valency of transition metals

Using Roman Numerals

What are the chemical formulas for the following compounds?

a) Copper(ii) chloride

b) Nickel (ii) bromide 

c) Vanadium(v) chloride 

a) CuCl₂

b) NiBr₂

c) VCl₅

How can we find the valency of an ion containing more than one kind of atom

Its in the data booklet

What are the chemical formulas for the following compounds?

a) Sodium hydroxide

b) Ammonium sulphite

c) Aluminium nitrate

a) NaOH

b) (NH₄)₂SO₃

c) Al(NO₃)₃

What must every ionic formula do for each charge

The charges must be balanced out 

What are the chemical formulas for the following compounds?

a) Sodium chloride

b) Lithium oxide

c) Aluminium oxide

a) Na^+ Cl^- 

b) (Li^+)2 O^-2

c) (Al3+)2(O^-2)3