5523818
Frage 1
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Isotopes of an element have the [blank_start]same[blank_end] atomic number but [blank_start]different[blank_end] mass numbers
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same
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different
Frage 2
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The relative mass is the [blank_start]average[blank_end] mass of an element compared to an atom of C-12.
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average
Frage 3
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A mass spectrometer measures:
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Moles
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Relative masses
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Shapes of molecules
Frage 4
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Work out the number of moles in 5.10g of Aluminium oxide.
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0.0500 moles
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5 moles
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0.5 moles
Frage 5
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Percentage yeild =
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theoretical yeild/actual yield x 100
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actual yield/theoritical yield x 100
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theoretical yield/actual yeild / 100
Frage 6
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Compounds that have water molecules incorporated into them are called water of crystalisation.
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- True
- False
Frage 7
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Methyl orange indicators turn from [blank_start]yellow[blank_end] to [blank_start]red[blank_end] when you add acid to an alkali.
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yellow
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red
Frage 8
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Phenolphthalein turns from [blank_start]red[blank_end] to [blank_start]colourless[blank_end] when you add acid to an alkali.
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red
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colourless
Frage 9
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Shells further away from the nucleus have a lower energy level than the ones closer to it.
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- True
- False
Frage 10
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Orbitals can contain up to [blank_start]2[blank_end] electrons.
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2
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1
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4
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3
Frage 11
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S orbital
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P orbital
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D orbital
Frage 12
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S orbital
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P orbital
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D orbital
Frage 13
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Electrons fill up the lowest energy sub-shells first.
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- True
- False
Frage 14
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How many electrons does a full p sub-shell contain
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2
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6
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3
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10
Frage 15
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Ionic compounds [blank_start]conduct[blank_end] electricity when they are [blank_start]molten[blank_end] or dissolved because the ions are [blank_start]free to move[blank_end].
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conduct
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molten
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free to move
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can't conduct
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liquid
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solid
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stationary
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stuck to each other
Frage 16
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Ionic compounds are often [blank_start]soluble[blank_end] in water.
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soluble
Frage 17
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In a covalent bond, the positive nuclei are attracted [blank_start]electrostatically[blank_end] to the shared electrons.
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electrostatically
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ionically
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intramolecularly
Frage 18
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Dative covalent bonds are when both electrons come from the same atom.
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- True
- False
Frage 19
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Giant covalent structures can conduct electricity.
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- True
- False
Frage 20
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[blank_start]Silicon dioxide[blank_end] is an example of a giant covalent structure.
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Silicon dioxide
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Sodium chloride
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Magnesium
Frage 21
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Metalic structures contain [blank_start]delocalised[blank_end] electrons.
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delocalised
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no
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localised
Frage 22
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What is the bond angle on a molecule containing 2 groups of paired electrons around a central atom?
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180
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109.5
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107
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120
Frage 23
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What is the bond angle on a molecule that contains 3 groups of paired electrons and 1 group of unpaired electrons?
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107
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104.5
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109.5
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120
Frage 24
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First ionisation enthalpy [blank_start]decreases[blank_end] down the group.
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decreases
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increases
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stays the same
Frage 25
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First ionisation enthalpy [blank_start]increases[blank_end] across a period.
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increases
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decreases
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stays the same
Frage 26
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Group 2 oxides and hydroxides are [blank_start]bases[blank_end].
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bases
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acidic
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neutral
Frage 27
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The colour of the flame test for Sodium is:
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orange-yellow
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crimson
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brick red
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green
Frage 28
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To test for sulphates you add HCl and [blank_start]Barium chloride[blank_end] and it turns white.
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Barium chloride
Frage 29
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Emission spectra contain black lines on a coloured background.
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- True
- False
Frage 30
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Electrons [blank_start]release[blank_end] energy as they [blank_start]drop[blank_end] from a higher energy level to a lower one.
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release
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drop
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take in
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jump
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