chemistry

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  • Created by: Katie
  • Created on: 08-04-15 17:17
name four things a solid must/must not do.
must have a fixed shape, must have a fixed volume, can not flow or be poured.
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name four things a liquid must/must not do.
does not have a fixed shape, must have a fixed volume, can flow and be poured.
2 of 40
name four things a gas must/must not do.
does not have a fixed shape, does not have a fixed volume, can flow and be poured.
3 of 40
what is the change when a gas changes to a liquid?
sublimation
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what is the change when a solid changes to a liquid?
melting
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what is the change when a liquid changes to a solid?
freezing
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what is the definition of diffusion?
the movement of particles moving from high concentration to an area of low concentration.
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what does diffusion in liquids prove?
it proves that liquids and gasses are at a constant state of movement called kinetic theory.
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what is sublimation?
a method used to change a gas to a solid or a solid to a gas.
9 of 40
explain the difference between boiling and evaporating.
to boil you must heat in order to break the attraction forces however in evaporation the particles are simply at different temperatures allowing those at the top to evaporate.
10 of 40
why is diffusion slower in liquids than gases?
it is because in a gas there are larger gaps between particles for the substance to move through. but liquids are packed quite tightly and therefore have less space between them.
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if an element had 10 neutrons and an atomic number of 9 how many protons and electrons does it have and what is the mass number?
mass number = 19, protons = 9, electrons = 9
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what are protons equal to?
neutrons and electrons
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when you add number of protons to the number of neutrons what do you get?
the mass number
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what is the atomic number equal to?
protons.
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what is the relative charge of a proton, neutron and an electron?
proton = 1, electron = -1, neutron = 0
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what is the relative mass of a proton, neutron and electron?
proton = 1, electron = 0, neutron = 1
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what is the central part of an atom?
the nucleus
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what does the atomic number mean?
the number of protons in an atom
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what is electron configuration?
the arrangement of electrons in the shell around the atoms nucleus.
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what is an isotope?
atoms that have the same number of protons but different numbers of neutrons
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where are electrons stored inside an atom?
shells
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how are elements put in groups?
by the amount of electrons in the outer shell.
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where are the protons and neutrons found in an atom?
the nucleus
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name group 1
the alkaline metals
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name group 2
the alkaline earth metals
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name group 7
the halogens
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name group 8
the noble gases
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name four physical properties of a metal
shiny, good conductor of heat, good conductor of electricity, flexible
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name two more elements with similar properties to argon.
xenon, helium
30 of 40
boron and aluminium are in the same group state whether they are metals or non metals.
boron=non metal, aluminium= metal
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what oxide does a metal produce and a non-metal produce?
metal= alkaline oxide, non-metal= acidic oxide
32 of 40
write a balanced equation for phosphorus + oxygen = phosphorus oxide (P2O5)
4P + 5O2 = 2P2O5
33 of 40
write a balanced equation for magnesium + oxygen = magnesium oxide (MgO)
2Mg + O2 = 2MgO
34 of 40
name three physical trends of group 1
the metals become softer, denser and have lower melting and boiling points as you go down the column.
35 of 40
name three chemical trends in group 1
the metals react more rapidly with oxygen and more vigerously with water as you go down the group. they are more reactive as you go down the column.
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name two physical trends in group 7
the melting and boiling points increase as you go down the group. the colour also gets darker further down the group.
37 of 40
name one chemical trend in group 7
the reactivity decreases down the group
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what happens when chlorine reacts with potassium bromine?
chlorine, being the most reactive of the two, will end up in the compound. chlorine displaces bromine producing potassium chloride and bromine.
39 of 40
what happens when iodine reacts with potassium bromide?
the iodine can not replace the bromine because it is less reactive. There is no reaction because there is not change.
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Card 2

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name four things a liquid must/must not do.

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does not have a fixed shape, must have a fixed volume, can flow and be poured.

Card 3

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name four things a gas must/must not do.

Back

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Card 4

Front

what is the change when a gas changes to a liquid?

Back

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Card 5

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what is the change when a solid changes to a liquid?

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