Term
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Definition
| Different structural forms of the same element e.g. diamond, graphite and buckminsterfullerine. |
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Term
What does the picture below show? What physical properties would you expect it to have?
[image] |
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Definition
| The picture shows graphite, an allotrope of carbon. Graphite conducts electricity because of the free electrons between the layers, it also feels soft as the layers can slide over one another. |
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Term
What sort of bonding is present in the sodium chloride crystal below?
[image] |
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Definition
| Metal + non-metal = ionic bonding |
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Term
| What is the formula of ammonia? |
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Definition
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Term
What are the formulae of the following acids?
Hydrochloric acid
Sulfuric acid
Nitric acid |
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Definition
Hydrochloric acid - HCl
Sulfuric acid - H2SO4
Nitric acid - HNO3 |
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Term
| What does the Ar of an element tell you? What are the units? |
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Definition
| The relative atomic mass - the mass of one atom of a substance on a scale where one atom of carbon-12 is exactly 12. It has no units! |
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Term
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Definition
| Different atoms of the same element with the same number of protons and electrons but a different number of neutrons. |
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