1. States of matter

1.1 Solids, liquids and gases

1.2 Diffusion

2. Atoms, elements and compounds

2.1 Elements, compounds and mixtures

2.2 Atomic structure and the Periodic Table

2.3 Isotopes

2.4 Ions and ionic bonds

2.5 Simple molecules and covalent bonds

2.6 Giant covalent structures

2.7 Metallic bonding

3. Stoichiometry

3.1 Formulae

3.2 Relative masses of atoms and molecules

3.3 The mole and the Avogadro constant

4. Electrochemistry

4.1 Electrolysis

4.2 Hydrogen–oxygen fuel cells

5. Chemical energetics

5.1 Exothermic and endothermic reactions

6. Chemical reactions

6.1 Physical and chemical changes

6.2 Rate of reaction

6.3 Reversible reactions and equilibrium

6.4 Redox

7. Acids, bases and salts

7.1 The characteristic properties of acids and bases

7.2 Oxides

7.3 Preparation of salts

8. The Periodic Table

8.1 Arrangement of elements

8.2 Group I properties

8.3 Group VII properties

8.4 Transition elements

8.5 Noble gases

9. Metals

9.1 Properties of metals

9.2 Uses of metals

9.3 Alloys and their properties

9.4 Reactivity series

9.5 Corrosion of metals

9.6 Extraction of metals

10. Chemistry of the environment

10.1 Water

10.2 Fertilisers

10.3 Air quality and climate

11. Organic chemistry

11.1 Formulae, functional groups and terminology

11.2 Naming organic compounds

11.3 Fuels

11.4 Alkanes

11.5 Alkenes

11.6 Alcohols

11.7 Carboxylic acids

11.8 Polymers

12. Experimental techniques and chemical analysis

12.1 Experimental design

12.2 Acid–base titrations

12.3 Chromatography

12.4 Separation and purification

12.5 Identification of ions and gases

IGCSE Chemistry 3.2 Relative masses of atoms and molecules Question Bank

[Maximum number: 1]

Diamond and graphite are different solid forms of carbon. The carbon atoms in diamond and graphite are arranged in different ways.

(a)

Buckminsterfullerene is a simple molecular form of carbon.

The relative molecular mass of Buckminsterfullerene is 720 .

Determine the number of carbon atoms in one molecule of Buckminsterfullerene.

[ 1 ]

[Maximum number: 1]

This question is about elements X, Y and Z.

(a)

(i)

Identify the atom against which the relative masses of all other atoms are compared.

[ 1 ]

[Maximum number: 1]

The table shows the numbers of protons, neutrons and electrons in particles A to I.

Answer the following questions about particles A to I. Each letter may be used once, more than once or not at all.

(a)

State which of the particles A to I:

[ 1 ]

(i)

is used to define the relative atomic mass of elements.

[ 1 ]

[Maximum number: 1]

The equation for the reaction of iron(III) oxide with carbon monoxide is shown.

\mathrm{Fe}_{2} \mathrm{O}_{3}(\mathrm{~s})+3 \mathrm{CO}(\mathrm{~g}) \rightarrow 2 \mathrm{Fe}(\mathrm{~s})+3 \mathrm{CO}_{2}(\mathrm{~g})

What is the maximum mass of iron that can be made from 480 g of iron(III) oxide?

56 g

112 g

168 g

336 g

[Maximum number: 2]

This question is about atoms, ions and isotopes.

(a)

What is meant by the term relative atomic mass?

[ 2 ]

(a)

The relative atomic masses of elements can be calculated from the relative masses of isotopes and their percentage abundances.

[ 1 ]

(i)

Identify the isotope to which all relative masses are compared.

[ 1 ]

[Maximum number: 1]

Which quantities of chemicals will react exactly with no reactants left over?

12 g of carbon and 12 g of oxygen

12 g of carbon and 48 g of oxygen

12 g of magnesium and 16 g of oxygen

24 g of magnesium and 16 g of oxygen

[Maximum number: 1]

A sample of 16.0 g of a metal oxide, MO , is reduced to 12.8 g of the metal, M .
What is the relative atomic mass, $A_{\mathrm{r}}$ , of M ?

128

[Maximum number: 1]

What is the relative molecular mass, $M_{\mathrm{r}}$ , of butanol?

148

[Maximum number: 1]

The relative atomic mass, $A_{\mathrm{r}}$ , of an element is determined by comparing the mass of one atom of the element with the mass of one atom of element Q.

What is Q ?

carbon

chlorine

hydrogen

oxygen

0 selected

Question 1

Question 1(f)

Question 1

Question 1(b)

Question 1(b)(ii)

Question 1

Question 1(a)

Question 1(a)(viii)

Question 6

Question 2

Question 2(d)

Question 2

Question 2(b)

Question 2(b)(i)

Question 8

Question 8

Question 8

Question 8