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Chemistry

Chemistry
What is the atomic number of mercury

80
41
32
63

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Chemistry
The total energy of revolving electron in an atom

Cannot be negative
Can have any value above zero
Will always be positive
Can never be positive

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Chemistry
The structure of NaCl crystal is

Face centered cubic
Octahedral
Body centered cubic
Square planar

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Chemistry
The pollutant responsible for ozone holes is ________

CFC
CO
SO2
CO2

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Chemistry
Gold dissolves in

Acetic acid
Nitric acid
Hydrochloric acid
Aqua-regia

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Chemistry
Peroxyacetyl nitrate is a

Plant hormone
Secondary pollutant
Vitamin
Acidic dye

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