Please select a subject first
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State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.
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Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
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Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
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State the atomicity of the following:
Neon
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State the atomicity of the following:
Oxygen
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State the atomicity of the following:
Chlorine
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State the atomicity of the following:
Argon
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State the atomicity of the following:
Sulphur
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Complete the table by writing the symbols of the following elements
| Element | Symbol |
| Aluminum | Al |
| Nickel | |
| Bromine | |
| Helium | |
| Magnesium |
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Mention two uses of the following metals and non-metals
Iron
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Mention two uses of the following metals and non-metals
Aluminium
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Mention two uses of the following metals and non-metals
Gold
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Mention two uses of the following metals and non-metals
Oxygen
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Mention two uses of the following metals and non-metals
Iodine
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Give reasons
Magnesium is used in fire works.
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Give reasons
Aluminium is used in making aircrafts.
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Give reasons
Graphite is used in the leads of pencils
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Give reasons
Gold is mixed with copper and nickel.
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Give two uses of Germanium
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Fill in the blank
_______ is a soft metal.
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