Question 1

What is an ion?

Accepted Answer

atom/molecule that has lost or gained electrons

Answer

atom/molecule that shares electrons with another atom

Answer

atom/molecule that has gained or lost neutrons

Answer

atom/molecule that has gained or lost protons

Question 2

Which kinds of elements can form ionic bonds?

Accepted Answer

metals and non-metals

Answer

metals and metals

Answer

metals and elements

Answer

non-metals and non-metals

Question 3

What charge do ions from Group 1 form?

Accepted Answer

$+1$

Answer

$+2$

Answer

$-1$

Answer

$-2$

Question 4

What charge do ions from Group 6 form?

Accepted Answer

$-2$

Answer

$+2$

Answer

$+1$

Answer

$-1$

Question 5

What charge do ions from Group 7 form?

Accepted Answer

$-1$

Answer

$+1$

Answer

$+2$

Answer

$2$

Question 6

What is the force that holds oppositely charged ions together?

Accepted Answer

electrostatic force of attraction

Answer

electromagnetic force

Answer

gravitational force

Answer

magnetic force

Question 7

What is the name of a regular structure of alternating positive and negative ions, held together by the electrostatic force of attraction?

Accepted Answer

giant ionic lattice

Answer

simple covalent

Answer

simple ionic molecule

Answer

giant covalent structure

Question 8

Why do ionic substances have high melting points?

Accepted Answer

electrostatic force of attraction between positive and negative ions is strong and requires lots of energy to break

Answer

the electrostatic attraction between negative electrons is very strong and so requires a lot of energy melt them

Answer

electrostatic force between positive neutrons and negative ions is strong and requires lots of energy to break

Answer

the ions in an ionic lattice are very closely packed together so require a lot of energy to pull them apart

Question 9

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 10

When can ionic substances conduct electricity?

Accepted Answer

when melted or dissolved

Answer

when frozen

Answer

when evaporated

Answer

when condensed

Question 11

Why do ionic substances conduct electricity when melted or dissolved?

Accepted Answer

ions are free to move and carry charge

Answer

electrons are free to slide over each other

Answer

there are delocalised electrons which can move and carry the charge

Answer

the non-metal ions become metals

Question 12

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 metal atoms surrounded by delocalised electrons

Answer

layers of positive metal ions surrounded by free negative ions

Question 13

Describe the bonding in a pure metal.

Accepted Answer

strong electrostatic forces of attraction between metal ions and delocalised electrons

Answer

strong gravitational forces of attraction between metal ions and delocalised electrons

Answer

strong electrostatic forces of attraction between metal atoms and delocalised electrons

Answer

strong magnetic forces of attraction between metal ions and delocalised electrons

Question 14

Which one of these is NOT a property of a pure metal?

Accepted Answer

brittle

Answer

good conductors of electricity

Answer

malleable

Answer

high melting/boiling points

Question 15

Why are pure metals malleable?

Accepted Answer

layers of positive ions can slide over each other easily

Answer

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

Answer

delocalised electrons make the metal malleable

Answer

layers of negative ions can easily slide over each other

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

magnetic forces of attraction between positive metal ions and delocalised electrons 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

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

Question 17

Why are metals good conductors of electricity and of thermal energy?

Accepted Answer

delocalised electrons are free to move through the metal

Answer

the positive ions are charged and so can carry heat and electricity along the metal

Answer

the ionic lattice of positive ions can vibrate easily transferring charge and heat quickly

Answer

delocalised ions are free to move through the metal

Question 18

What is an alloy?

Accepted Answer

mixture of a metal with atoms of another element

Answer

mixture of substances

Answer

a compound of metals with atoms of another element

Answer

mixture of a non metal with atoms of another element

Question 19

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

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

Answer

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

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