Particles spread out and mix. This occurs in both gases and liquids but goes faster in gases
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Displacement reaction
Sometimes called a “reactivity series reaction” this is where a reactive metal takes the place of an unreactive one in a compound. Look at this example (zinc is more reactive than copper or you could say that zinc is higher in the reactivity series t
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Distillation
A liquid is separated from its solution by heating it so that the liquid evaporates and then cooling the vapour so that it condenses somewhere else.
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Element
This is a substance that is composed of only one kind of atom. All the atoms in an element are the same. A chemical reaction cannot break an element into anything simpler.
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Electron
An atomic particle of very small mass (1/1840 of the mass of a proton) and a charge of one minus. It is found in an atom in shells or orbits surrounding the nucleus but not part of the nucleus.
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Filtering (Filtration)
A method of removing an insoluble solid from a liquid. The liquid particles and any dissolved particles are small enough to fit through the holes in a filter paper. An undissolved solid has particles that are too big to do so.
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Ion
An atom or group of atoms that has gained or lost one or more elecrons.
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Metamorphic
Referring to rock types it means that the rock has been changed by the action of heat and / or pressure. Examples include marble (which is formed from limestone).
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Molecule
Two or more atoms joined together by a covalent bond. Molecules can be elements (eg H2 , O2 etc) or compounds (eg CH4 , H2SO4).
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Oxidation
A reaction in which oxygen is added to a substance. For every oxidation, there is always a reduction (something losing oxygen) of some kind.
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Photosynthesis
Plants take in carbon dioxide and water. They use the energy from the Sun to make new substances glucose and oxygen. Glucose and oxygen have a higher energy content than carbon dioxide and water.
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Respiration
All living cells carry out this reaction. Glucose and oxygen are converted to carbon dioxide and water releasing energy. The energy is used to carry out useful reactions in the cell.
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Ionic bond
An ionic bond holds two ions (of opposite charge) together by electrostatic attraction. Ionic bonding occurs between a metal and a non-metal. A good example is sodium chloride.
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Other cards in this set
Card 2
Front
Displacement reaction
Back
Sometimes called a “reactivity series reaction” this is where a reactive metal takes the place of an unreactive one in a compound. Look at this example (zinc is more reactive than copper or you could say that zinc is higher in the reactivity series t
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