A particle consists of zinc atoms only. The zinc atoms are described as:
a molecule
an element
a compound
an ion
The columns on the periodic table are called
Groups
Periods
Eras
Collections
The atomic number of an element means
the number of atoms in a molecule of that element.
the number of neutrons in the nucleus
the number of protons in the nucleus
the number of protons and neutrons in the nucleus.
The removal of an electron from an atom makes
the element change;
a negative ion;
a neutral ion;
a positive ion
Which one of these is correct about the isotope carbon 14?
It has 6 neutrons and 8 protons.
It has 6 protons and 8 neutrons.
The neutrons in the isotope are negatively charged, while the electrons are neutral.
There are 8 electrons and 6 neutrons.
Group I metals have a single outer shell electron. This means that:
All Group I metals form ions with a single positive charge.
All Group I metals form ions with a single negative charge.
All Group I metals form ions with two positive charge (2+).
All Group I metals form ions with two negative charge (2-).
The electronic configuration of lithium is 2, 1. Sodium is the next metal in the group. Which one correctly describes the electronic configuration of sodium?
2, 2
2, 6, 1
2, 8, 1
2, 8, 2
Chemical reaction involve:
the protons
the neutrons
the inner shell electrons
the outer shell electrons
Noble gases have full outer electron shells. This makes them:
very unreactive
very reactive
very acidic
very poisonous.
When elements react they adopt a noble gas structure, which means:
there are no electrons at all.
the electrons have gained a neutral charge
the outer shells are full
the outer shells are empty
Compounds like sodium chloride are bonded by the attraction of opposite charges. This is called:
molecular bonding
ionic bonding
covalent bonding
crystal bonding
Carbon has 4 electrons in its outer shell. When it forms compounds, it bonds by:
ionic bonding with a 4+ charge
ionic bonding with a 4-charge
snatching electrons from other elements
sharing electrons with other atoms.
The sharing of electrons is called:
ionic bonding
covalent bonding
ionisation
organic bonding
Limestone formed from:
volcanic activity
buckling of the Earth's crust.
glacial activity.
growth of corals in warm shallow tropical seas
The main mineral in limestone is
codium hydroxide
copper sulphate
calcium carbonate
magnesium oxide
Which one of these statements is true about concrete?
It is strong in compression (squashing) and strong in tension (stretching).
It is weak in compression and weak in tension
It is strong in compression and weak in tension
It is weak in compression and strong in tension
Iron is extracted from an ore called:
malachite
haematite
quartzite
bauxite
Iron is extracted from its ore in:
a kiln
a blast furnace
an electric arc furnace
an electrolysis cell.
Iron is heated with coke and limestone. The products are:
iron, carbon dioxide, calcium silicate (slag).
iron, calcium oxide, carbon tetrasilicate (slag)
carbon, calcium oxide, ferric silicate (slag)
carbon dioxide, silicon carbide (slag), iron oxide
Pure iron is not very useful. This is because:
it rusts very easily
it melts at low temperatures
it is not very strong
it is very brittle.
Steel is made up of iron and carbon. It is:
an alloy
a compound
an element
a solution.
High carbon steel is used for:
ornate gates (for MPs' houses).
car bodies.
hammers
machine tools
Which one of these is NOT a property of metals?
They are ductile.
They are liquids at room temperature.
They a good conductors of electricity.
They are strong
Metals have delocalised electrons. This means that:
the metals consists of ions in a sea of free electrons.
the electrons are bound strongly with the metal atoms.
the metals share electrons in covalent bonds.
the outer shell electrons have been destroyed.
Which one of these is NOT a property of aluminium?
It has a very low density.
It is a good conductor of electricity
It forms strong alloys
It is magnetic.
Aluminium is extracted using:
an electric arc furnace;
a blast furnace;
an electrolysis cell;
heating with hydrogen.
Aluminium is very reactive, but aluminium bodies on aeroplanes are often unpainted. This is because:
the aluminium corrodes so quickly that it has to be replaced, so it's not worth painting it.
aluminium reacts with the paint, which can be dangerous and cause a fire.
aluminium rapidly forms an oxide layer which will not allow paint to stick.
aluminium rapidly forms a tough oxide layer which prevents further corrosion.
Redox means:
a simultaneous reduction and oxidation reaction
a two stage oxidation reaction.
a reaction where the amount of oxygen is reduced.
a type of luxury bath salts.
Which one of these properties is correct for titanium?
It is very abundant, so it's very cheap.
It has a very high density.
It is very reactive, so it's hard to extract.
It is a Group I metal
Copper is widely used because it's a good conductor of electricity. Which one other property makes it so useful?
It is very strong.
It is not very dense.
It is magnetic
It is unreactive.
The alloy between copper and zinc is:
yellow stainless steel;
brass;
bronze;
nichrome
A smart alloy is one that:
is used to make fashion items;
is used in computers;
is used in smart weapons;
is used in applications to regain its original shape.
Which one of these is a disadvantage of electric vehicles?
The concept is rather old-fashioned.
They are very quiet
They have a limited range.
Electric cars are not as sophisticated as petrol cars.
Which one of these represents the products of a fractional distillation column in order of increasing size?
Butane and methyl propane have the same molecular formulae, but different structural formulae. They are referred to as:
allotropes
isotopes
isomers
polymers
Which one of these is NOT responsible for global warming?
Increase in carbon dioxide levels.
Hole in the ozone layer.
Increased release of methane from frozen marshes that are thawing.
Water vapour released from burning hydrocarbon fuels.
Which one of these could cause global dimming?
Dust from volcanic activity
Emmission of methane from marshes
The hole in the ozone layer.
Radioactive materials in rocks.
If there were NO greenhouse gases, the result will be:
the planet would be much cleaner.
the planet would be much warmer.
the planet would be much colder.
the planet would be exposed to UV rays from the Sun
The gas responsible for acid rain is:
methane;
carbon dioxide;
ozone;
sulphur dioxide.
In a scrubber, sulphur dioxide is mixed with water and limestone to remove it from the waste gases of a power station. The main product of the reaction is: