What is the charge of a proton? - ANSWERS+1
What is the charge of a neutron? - ANSWERS0
What is the charge of an electron? - ANSWERS-1
What is the relative mass of a proton? - ANSWERS1
What is the relative mass of a neutron? - ANSWERS1
What is the relative mass of an electron? - ANSW...
AQA GCSE Chemistry - Paper 1
Questions & Answers
What is the charge of a proton? - ANSWERS+1
What is the charge of a neutron? - ANSWERS0
What is the charge of an electron? - ANSWERS-1
What is the relative mass of a proton? - ANSWERS1
What is the relative mass of a neutron? - ANSWERS1
What is the relative mass of an electron? - ANSWERSVery small
How many types of atoms do elements contain? - ANSWERSOnly one type
What are compounds? - ANSWERSSubstances containing two or more different
elements that are chemically bonded together
What are mixtures? - ANSWERSSubstances containing two or more different elements
that are not chemically bonded together
What pattern is formed from carrying out paper chromatography? -
ANSWERSChromatogram
Which method of separation is useful to separate an insoluble solid from a liquid? -
ANSWERSFiltration
Which method of separation is useful to separate a soluble solid from a liquid? -
ANSWERSEvaporation or Crystillisation
Which method of distillation separates liquids with similar boiling points? -
ANSWERSFractional distillation
Who discovered that the plum pudding model was wrong? - ANSWERSErnest
Rutherford
,Who devised an experiment that proved the existence of the neutron? -
ANSWERSNiels Bohr
Why did Mendeleev leave gaps in his Table of Elements? - ANSWERSTo 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? - ANSWERSThe 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? - ANSWERSPositive
Where are the non-metals on the periodic table? - ANSWERSOn the right hand side
Give three properties which are specific to transition metals - ANSWERS1) 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 - ANSWERS1) 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 -
ANSWERSHydrogen 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? -
ANSWERSTransition metals are harder, denser and stronger than Group 1 metals
What's the difference between the reactivity of Group 1 and transition metals? -
ANSWERSGroup 1 metals are much more reactive than transition metals
What's the difference between the melting points of Group 1 and transition metals? -
ANSWERSTransition metals have higher melting points than Group 1 metals
What trends occur as you go down Group 7? - ANSWERS1) 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? -
ANSWERSThey form negative ions
What is the trend in boiling point as you go down Group 0? - ANSWERSThe boiling
points increase
What subatomic particles does the nucleus contain? - ANSWERSProtons and neutrons
What is relative atomic mass? - ANSWERSThe mass number which refers to the
element as a whole
How are positive ions formed? - ANSWERSA metal atom loses electrons
How are negative ions formed? - ANSWERSA non-metal gains electrons
What is air a mixture of? - ANSWERSGases, mainly nitrogen, oxygen, carbon dioxide
and argon
What is crude oil a mixture of? - ANSWERSDifferent length hydrocarbon molecules
How can you separate substances in a mixture? - ANSWERSChromatography
What is simple distillation used for? - ANSWERSSeparating out a liquid from a solution
E.g. separating pure water from seawater
How were elements arranged in the early 1800s? - ANSWERSBy their physical and
chemical properties and their relative atomic mass
How are columns arranged? - ANSWERSElements with similar properties
What are the three similar basic properties of metals? - ANSWERS1) They're strong but
are malleable
2) They're great at conducting heat and electricity
3) They have high boiling and melting points
What is the product of the reaction of a Group 1 metal with chlorine? - ANSWERSA
metal chloride salt
E.g. sodium + chlorine --> sodium chloride
What is the product of the reaction of a Group 1 metal with oxygen? - ANSWERSA
metal oxide, depending on the Group 1 metal
-Lithium + oxygen --> lithium oxide
-Sodium + oxygen --> sodium oxide + sodium peroxide
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