GCSE Chemistry - Paper 1 Exam Questions And Correct Answers 2024.
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Grado
GCSE Chemistry
Institución
GCSE Chemistry
What is the charge of a proton? - Answer +1
What is the charge of a neutron? - Answer 0
What is the charge of an electron? - Answer -1
What is the relative mass of a proton? - Answer 1
What is the relative mass of a neutron? - Answer 1
What is the relative mass of an electr...
GCSE Chemistry - Paper 1 Exam Questions And Correct Answers 2024.
What is the charge of a proton? - Answer +1
What is the charge of a neutron? - Answer 0
What is the charge of an electron? - Answer -1
What is the relative mass of a proton? - Answer 1
What is the relative mass of a neutron? - Answer 1
What is the relative mass of an electron? - Answer Very small
How many types of atoms do elements contain? - Answer Only one type
What are compounds? - Answer Substances containing two or more different elements that are chemically bonded together
What are mixtures? - Answer Substances containing two or more different elements that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? - Answer Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid? - Answer Filtration
Which method of separation is useful to separate a soluble solid from a liquid? - Answer Evaporation or Crystillisation Which method of distillation separates liquids with similar boiling points? - Answer Fractional distillation
Who discovered that the plum pudding model was wrong? - Answer Ernest Rutherford
Who devised an experiment that proved the existence of the neutron? - Answer Niels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - Answer 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? - Answer 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? - Answer Positive
Where are the non-metals on the periodic table? - Answer On the right hand side
Give three properties which are specific to transition metals - Answer 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 - Answer 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 - Answer 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? - Answer Transition metals are harder, denser and stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition metals? - Answer Group 1 metals are much more reactive than transition metals
What's the difference between the melting points of Group 1 and transition metals? - Answer Transition
metals have higher melting points than Group 1 metals
What trends occur as you go down Group 7? - Answer 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? - Answer They form negative ions
What is the trend in boiling point as you go down Group 0? - Answer The boiling points increase
What subatomic particles does the nucleus contain? - Answer Protons and neutrons
What is relative atomic mass? - Answer The mass number which refers to the element as a whole
How are positive ions formed? - Answer A metal atom loses electrons
How are negative ions formed? - Answer A non-metal gains electrons
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