Question 1

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

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 2

What is the relative charge of an electron?

Accepted Answer

$-1$

Answer

$-2$

Answer

$0$

Answer

$+1$

Question 3

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 sum of the number of neutrons and electrons

Answer

the number of neutrons in an atom

Question 4

mass number $-$ atomic number =

Accepted Answer

number of neutrons

Answer

total number of protons and electrons

Answer

number of electrons

Answer

number of protons

Question 5

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 6

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

Answer

alloys

Answer

compounds

Answer

elements

Question 7

What is the relative atomic mass?

Accepted Answer

the average mass of all the atoms of an element

Answer

the mass of all of the electrons combined in an atom

Answer

the total mass of all the atoms in an element

Answer

the total mass of all the isotopes of an element combined

Question 8

How are covalent bonds formed?

Accepted Answer

by atoms sharing electrons

Answer

by the transfer of electrons

Answer

by the formation of ions

Answer

by metals combining and sharing their delocalised electrons

Question 9

Small molecules consist of small numbers of atoms grouped together into molecules with ______ covalent bonds between the atoms and ______ intermolecular forces between the molecules.

Accepted Answer

strong; weak

Answer

weak; metallic

Answer

strong; ionic

Answer

weak; strong

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 intermolecular forces are weaker in large molecules

Answer

the covalent forces are stronger in small molecules

Answer

the ionic bonds are stronger in large molecules

Question 11

Why do most covalent substances not conduct electricity?

Accepted Answer

they do not have free electrons or delocalised ions

Answer

they have shared electrons

Answer

they do not have electrons

Answer

they are non-metals

Question 12

Which one of these is NOT a property of graphene?

Accepted Answer

soluble

Answer

strong

Answer

conducts electricity

Answer

flexible

Question 13

What is a nanotube?

Accepted Answer

hollow cylinder of carbon atoms

Answer

hollow cage of carbon atoms arranged as a sphere

Answer

hollow cylinder of silicon atoms

Answer

hollow cage of silicon atoms

Question 14

What charge do ions from Group 7 form?

Accepted Answer

$-1$

Answer

$+1$

Answer

$+2$

Answer

$2$

Question 15

What is the force that holds oppositely charged ions together?

Accepted Answer

electrostatic force of attraction

Answer

gravitational force

Answer

magnetic force

Answer

electromagnetic force

Question 16

Why don't ionic substances conduct electricity when solid?

Accepted Answer

ions are fixed in position so cannot move, and there are no delocalised electrons

Answer

ions are not charged

Answer

they contain non-metal elements which cannot conduct

Answer

ionic crystals cannot slide over each other and carry charge

Question 17

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 positive metal ions surrounded by free negative ions

Answer

layers of non metal atoms surrounded by delocalised electrons

Answer

layers of metal atoms surrounded by delocalised electrons

Question 18

Why are pure metals malleable?

Accepted Answer

layers of positive ions can slide over each other easily

Answer

layers of negative ions can easily slide over each other

Answer

the lattice of positive ions can change shape without having to move the layers

Answer

delocalised electrons make the metal malleable

Question 19

What is a mixture of a metal with atoms of another element called?

Accepted Answer

alloy

Answer

ion

Answer

ion

Answer

isotope

Question 20

Where are metals and non-metals located on the Periodic Table?

Accepted Answer

metals to the left, non-metals to the right

Answer

metals to the bottom, non-metals to the top

Answer

metals to the top, non-metals to the bottom

Answer

metals to the right, non-metals to the left

Question 21

What is the general equation for the reactions of alkali metals with oxygen?

Accepted Answer

metal + oxygen $\rightarrow$ metal oxide

Answer

metal + water $\rightarrow$ metal hydroxide + hydrogen

Answer

metal + chlorine $\rightarrow$ metal chloride

Answer

metal + water $\rightarrow$ metal hydroxide

Question 22

What is produced when an alkali metal reacts with water?

Accepted Answer

metal hydroxide + hydrogen

Answer

metal + oxygen

Answer

metal + hydrogen

Answer

metal hydroxide + oxygen

Question 23

Which of these statements is NOT a reason why it is harder for the halogens to gain an electron as you move down the group?

Accepted Answer

they gain more neutral neutrons that cancel out the attraction of the positive protons

Answer

they gain more electron shells so there is more shielding between the nucleus and outer shell

Answer

they are larger atoms, so the outermost shell is further from the positive nucleus

Answer

they gain more electron shells so there are weaker electrostatic forces of attraction acting on the outermost electron

Question 24

Which formula is used to calculate volume from concentration and mass?

Accepted Answer

$	ext {volume(dm}^3)= \frac {	ext {mass (g)}}{	ext {concentration (g/dm}^3)}$

Answer

$	ext {concentration (g/dm}^3)= \frac{	ext {volume (dm}^3)}{	ext {mass (g)}}$

Answer

$	ext {volume = concentration} 	imes 	ext {moles}$

Answer

$	ext {mass (g)}= \frac{	ext {volume (dm}^3) }{	ext    {concentration (g/dm}^3)}$

Question 25

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 lose their inner shell electron(s) more easily

Answer

they fill up their inner shell(s) more easily

Answer

they gain outer shell electron(s) more easily

Question 26

In terms of $	ext H^+$ ions, what is an acid?

Accepted Answer

a substance that releases $	ext H^+$ ions when dissolved in water

Answer

a substance which absorbs $	ext H^+$ ions when dissolved in solution

Answer

a substance which reacts with $	ext H^+$ ions

Answer

a substance that releases $	ext{OH}-$ ions when dissolved in water

Question 27

What is the chemical formula for nitric acid? $	ext{HNO}_3?$

Accepted Answer

$	ext{HNO}_3$

Answer

$	ext{H}_2	ext{SO}_4$

Answer

$	ext{HNO}_2$

Answer

$	ext{H}_2	ext{NO}_3$

Question 28

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

Accepted Answer

salt $+$ hydrogen

Answer

salt $+$ carbon dioxide

Answer

salt $+$ oxygen

Answer

salt $+$ water

Question 29

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

Accepted Answer

salt $+$ water

Answer

salt $+$ oxygen

Answer

salt $+$ hydrogen

Answer

salt $+$ carbon dioxide $+$ water

Question 30

Where are non-metals formed in electrolysis?

Accepted Answer

anode

Answer

cation

Answer

anion

Answer

cathode

Question 31

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

Accepted Answer

oxygen

Answer

hydrogen

Answer

metal

Answer

sulphate

Question 32

What kind of metals are extracted from ionic compounds by using electrolysis?

Accepted Answer

metals that are more reactive than carbon

Answer

metals that are less reactive than carbon

Answer

metals that are more reactive than hydrogen

Answer

all transition metals

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