chemical reactions sb
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Chemical ReactionsTRANSCRIPT
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Elements, Atoms, Compounds and
Molecules
By Samantha Bennett
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What is an atom?
An atom is fundamental piece of matter which it is made up of protons, neutrons and electrons
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What is an element
An element is a pure substance made up of one type of atom.
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Metals
Metal is an element, compound, or alloy that conducts heat and electricity.
Copper
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Non metals A non-metal is an element on the
periodic table that does not have the properties of a metal element such as malleability. Non metals are usually found as gases in nature or weak, brittle solids.
Phosphorus
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Compounds
A chemical compound is a pure chemical substance consisting of two or more different chemical elements.
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Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemicals substances to another.
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Identifying chemical reactions
Heat and light gas or precipitate
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A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change - you can't 'unburn' it
Chemical and physical reactions
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Factors affecting a reaction rate?
Temperature, concentration, size of particles or using a catalyist
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Bibliography http://www.qrg.northwestern.edu/proje
cts/vss/docs/Propulsion/1-what-is-an-atom.html
http://www.ncbi.nlm.nih.gov/pccompound
http://web.jjay.cuny.edu/~acarpi/NSC/6-react.htm
http://en.wikipedia.org/wiki/Wiki