Use the substances named in the table to answer the following questions.
Name of the substance
Argon
Helium
Oxygen
Melting point/"c
-189
270
219
Boiling point/°C
186
269
-183
(11)
[HD)
Name the substances, which is a liquid over the largest range of temperature.
Which substances are liquids at -187°C?
Name a monoatomic gas.
Answers
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Answer: Argon , oxygen
Explanation: argon mp is -189 and bp is -186,
oxygen mp is -219 nd bp is -183
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