Question 1

Where are protons and neutrons found?

Accepted Answer

in the nucleus

Answer

n the space around the nucleus

Answer

inside the electron

Answer

in shells

Question 2

Which is the relative mass and relative charge of a proton?

Accepted Answer

relative mass: $1$; relative charge: $+1$

Answer

relative mass: $1$; relative charge $-1$

Answer

relative mass: $0$; relative charge: $+1$

Answer

relative mass: $0$; relative charge: $-1$

Question 3

What is the relative charge of an electron?

Accepted Answer

$-1$

Answer

$0$

Answer

$+1$

Answer

$-2$

Question 4

What is the atomic number of an atom?

Accepted Answer

the number of protons in an atom

Answer

the sum of the number protons and neutrons

Answer

the number of neutrons in an atom

Answer

the sum of the number of neutrons and electrons

Question 5

mass number $-$ atomic number =

Accepted Answer

number of neutrons

Answer

total number of protons and electrons

Answer

number of protons

Answer

number of electrons

Question 6

Why do atoms have no overall charge?

Accepted Answer

equal numbers of positive protons and negative electrons

Answer

neutrons are the heaviest so determine the charge

Answer

protons are neutral

Answer

equal numbers of positive protons and negative neutrons

Question 7

How many electrons would you place in the first, second, and third shells?

Accepted Answer

up to 2 in the first shell and up to 8 in the second and third shells

Answer

up to 2 in the first shell and up to 4 in the second and third shells

Answer

1 in first shell, 2 in the second shell and up to 6 in the third shell

Answer

up to 4 in the first shell and up to 8 in the second and third shells

Question 8

What is the name of atoms of the same element with the same number of protons but different number of neutrons are?

Accepted Answer

isotopes

Question 9

How are covalent bonds formed?

Accepted Answer

by atoms sharing electrons

Answer

by the formation of ions

Answer

by the transfer of electrons

Answer

by metals combining and sharing their delocalised electrons

Question 10

Why do large simple molecules have higher melting and boiling points than smaller simple molecules?

Accepted Answer

the intermolecular forces are stronger between larger molecules

Answer

the covalent forces are stronger in small molecules

Answer

the intermolecular forces are weaker in large molecules

Answer

the ionic bonds are stronger in large molecules

Question 11

Which of these points correctly explains why graphite is slippery?

Accepted Answer

there are only weak forces of attraction between layers so they can slide over each other

Answer

each carbon atom makes 3 strong covalent bonds making a smooth surface

Answer

it is composed of strong covalent bonds so the layers cannot slide over each other

Answer

it has free electrons that can conduct heat and electricity

Question 12

What are two properties of nanotubes?

Accepted Answer

high tensile strength & conduct electricity

Answer

conduct heat & highly reactive

Answer

strong & magnetic

Answer

brittle & slippery

Question 13

What charge do ions from Group 6 form?

Accepted Answer

$-2$

Answer

$+1$

Answer

$-1$

Answer

$+2$

Question 14

When can ionic substances conduct electricity?

Accepted Answer

when melted or dissolved

Answer

when frozen

Answer

when condensed

Answer

when evaporated

Question 15

Which of these correctly describes the structure of a pure metal?

Accepted Answer

layers of positive metal ions surrounded by delocalised electrons

Answer

layers of non metal atoms surrounded by delocalised electrons

Answer

layers of positive metal ions surrounded by free negative ions

Answer

layers of metal atoms surrounded by delocalised electrons

Question 16

Why do metals have high melting and boiling points?

Accepted Answer

electrostatic force of attraction between positive metal ions and delocalised electrons is strong and requires a lot of energy to break

Answer

force of attraction between positive metal ions and delocalised neutrons is strong and requires a lot of energy to break

Answer

electrostatic force of repulsion between positive metal atoms and delocalised protons is strong and requires a lot of energy to break

Answer

magnetic forces of attraction between positive metal ions and delocalised electrons is strong and requires a lot of energy to break

Question 17

Why are alloys harder than pure metals?

Accepted Answer

different sized atoms disturb the layers, preventing them from sliding over each other

Answer

the atoms added to the metal make strong ionic bonds with the metal atoms

Answer

the non-metal atoms in the alloy make strong covalent bonds

Answer

different sized atoms hold the layers strongly together, creating stronger electrostatic forces of attraction

Question 18

What name is given to the Group 1 elements?

Accepted Answer

alkalimetals

Question 19

What is produced when an alkali metal reacts with water?

Accepted Answer

metal hydroxide + hydrogen

Answer

metal + oxygen

Answer

metal hydroxide + oxygen

Answer

metal + hydrogen

Question 20

What is the formula for the SECOND MOST reactive halogen?

Accepted Answer

$	ext{Cl}_2$

Answer

$	ext{F}_2$

Answer

$	ext{I}_2$

Answer

$	ext{Br}_2$

Question 21

Why are the noble gases inert?

Accepted Answer

they have full outer shells so do not need to lose or gain electrons

Answer

they have seven electrons in their outer shell and need to gain an electron

Answer

they have 0 electrons in their outer shell

Answer

they have one electron in their last shell and need to lose 1 electron

Question 22

When a metal forms a metal oxide, why does the mass increase?

Accepted Answer

atoms from gaseous oxygen have been added

Answer

atoms from gaseous hydrogen have been added

Answer

atoms from gaseous nitrogen have been added

Answer

atoms from gaseous oxygen have been removed

Question 23

What is the value for Avogadro's constant?

Accepted Answer

$6.02 	imes 10^{23}$ particles

Answer

$7.02 	imes 10^{23}$ particles

Answer

$2.06 	imes 10^{32}$ particles

Answer

$6.2 	imes 10^{10}$ particles

Question 24

Which formula is used to calculate the number of moles from mass and $M_r$?

Accepted Answer

moles $= \frac{ mass }{ M_r }$

Answer

$	ext {moles} = 	ext {mass} 	imes 	ext  M_r$

Answer

$	ext {mass} = \frac{	ext {moles} }{ M_r }$

Answer

$	ext {moles} = \frac{	ext M_r }{	ext {mass} }$

Question 25

What is a limiting reactant?

Accepted Answer

the reactant that is completely used up in a chemical reaction

Answer

the reactant that acts like a catalyst to speed up a reaction without being used up

Answer

the product that is completely used up in a chemical reaction

Answer

the conditions controlling the rate of a chemical reaction

Question 26

If the volume of water in a solution is increased, what happens to its concentration?

Accepted Answer

decreases

Answer

stays the same

Answer

increases

Question 27

In terms of electrons, what makes some metals more reactive than others?

Accepted Answer

they lose their outer shell electron$(s)$ more easily

Answer

they fill up their inner shell$(s)$ more easily

Answer

they gain outer shell electron$(s)$ more easily

Answer

they lose their inner shell electron$(s)$ more easily

Question 28

In terms of electrons, what is oxidation?

Accepted Answer

loss of electrons

Answer

addition of oxygen

Answer

gain of electrons

Answer

reaction with oxygen

Question 29

How is the amount of $	ext H^+$ ions in a solution related to its $	ext {pH}?$

Accepted Answer

the more $	ext H^+$ ions, the lower the $	ext {pH}$

Answer

the more $	ext H^+$ ions, the higher the $	ext {pH}$

Answer

the more $	ext H^+$ ions, the closer the $	ext {pH}$ is to neutral, $	ext {pH7}$

Answer

the amount of $	ext H^+$ ions does not affect the $	ext {pH}$

Question 30

What is a weak acid?

Accepted Answer

an acid where the molecules or ions partially ionise in water

Answer

an acid which reacts quickly

Answer

an acid which reacts slowly

Answer

an acid where the molecules or ions completely ionise in water

Question 31

What are the products of a reaction between a metal hydroxide and an acid?

Accepted Answer

salt $+$ water

Answer

salt $+$ oxygen

Answer

salt $+$ carbon dioxide $+$ water

Answer

salt $+$ hydrogen

Question 32

When an acid reacts with a metal, which species is reduced?

Accepted Answer

hydrogen

Answer

the anion in the acid

Answer

oxygen

Answer

the metal

Question 33

In the electrolysis of solutions, when is the metal NOT produced at the cathode?

Accepted Answer

when the metal is more reactive than hydrogen

Answer

when the metal is more reactive than carbon

Answer

when the metal is less reactive than hydrogen

Answer

when the metal is less reactive than carbon

Question 34

In the electrolysis of a metal sulfate solution, what is produced at the anode?

Accepted Answer

oxygen

Answer

sulphate

Answer

metal

Answer

hydrogen

Question 35

In the electrolysis of aluminium oxide, why is the aluminium oxide mixed with cryolite?

Accepted Answer

to lower the melting point

Answer

to increase the melting point

Answer

to lower the boiling point

Answer

to increase the conductivity

Question 36

In the electrolysis of aluminium oxide, what are the anodes made of?

Accepted Answer

graphite

Answer

copper

Answer

steel

Answer

iron

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