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