Exam (elaborations) AQA GCSE CHEMISTRY 8462/1H PAPER 1

AQA GCSE CHEMISTRY 8462/1H
PAPER 1 HIGHER TIER MARK
SCHEME JUNE 2024

,What is the charge of a proton? - CORRECT ANSWERS-+1

What is the charge of a neutron? - CORRECT ANSWERS-0

What is the charge of an electron? - CORRECT ANSWERS--1

What is the relative mass of a proton? - CORRECT ANSWERS-1

What is the relative mass of a neutron? - CORRECT ANSWERS-1

What is the relative mass of an electron? - CORRECT ANSWERS-Very small

How many types of atoms do elements contain? - CORRECT ANSWERS-Only one type

What are compounds? - CORRECT ANSWERS-Substances containing two or more
different elements that are chemically bonded together

What are mixtures? - CORRECT ANSWERS-Substances containing two or more
different elements that are not chemically bonded together

What pattern is formed from carrying out paper chromatography? - CORRECT
ANSWERS-Chromatogram

Which method of separation is useful to separate an insoluble solid from a liquid? -
CORRECT ANSWERS-Filtration

Which method of separation is useful to separate a soluble solid from a liquid? -
CORRECT ANSWERS-Evaporation or Crystillisation

Which method of distillation separates liquids with similar boiling points? - CORRECT
ANSWERS-Fractional distillation

Who discovered that the plum pudding model was wrong? - CORRECT ANSWERS-
Ernest Rutherford

Who devised an experiment that proved the existence of the neutron? - CORRECT
ANSWERS-Niels Bohr

Why did Mendeleev leave gaps in his Table of Elements? - CORRECT ANSWERS-To
ensure that elements with similar properties stayed in the same groups. The gaps
indicated the existence of undiscovered elements and allowed Mendeleev to predict
what their properties might be

How are the group number and the number of electrons in the outer shell of an element
related? - CORRECT ANSWERS-The group number tells you how many electrons are

, in the outer shell of an element. E.g. sodium is in Group 1 therefore it has 1 electron on
its outer shell

What kind of ions do metals form? - CORRECT ANSWERS-Positive

Where are the non-metals on the periodic table? - CORRECT ANSWERS-On the right
hand side

Give three properties which are specific to transition metals - CORRECT ANSWERS-1)
They can form more than one ion e.g cobalt form Co2+
2) They are often coloured, therefore compounds which contain them are colourful e.g.
potassium chromate is yellow
3) They often make good catalysts e.g. nickel based catalysts are used in the
hydrogenation of alkenes

State three trends as you go down Group 1 - CORRECT ANSWERS-1) Increased
reactivity - the outer electron is more easily lost as the attraction between the nucleus
and the electron decreases because the electron is further away from the nucleus
2) Lower melting and boiling points
3) Higher relative atomic mass

What are the products of the reaction of a Group 1 metal and water - CORRECT
ANSWERS-Hydrogen gas and a metal hydroxide
E.g. sodium + water --> sodium hydroxide + hydrogen

What's the difference between the hardness of Group 1 and transition metals? -
CORRECT ANSWERS-Transition metals are harder, denser and stronger than Group 1
metals

What's the difference between the reactivity of Group 1 and transition metals? -
CORRECT ANSWERS-Group 1 metals are much more reactive than transition metals

What's the difference between the melting points of Group 1 and transition metals? -
CORRECT ANSWERS-Transition metals have higher melting points than Group 1
metals

What trends occur as you go down Group 7? - CORRECT ANSWERS-1) They become
less reactive - it's harder to gain an extra electron because the outer shell's further from
the nucleus
2) They have higher melting and boiling points
3) They have higher relative atomic masses

What is the charge of the ions that halogens form when they react with metals? -
CORRECT ANSWERS-They form negative ions