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Chemistry, 22.06.2019 08:30
The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true
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Chemistry, 22.06.2019 13:50
How does the motion of particles in a gas change as the gas cools
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Chemistry, 22.06.2019 21:00
One similarity and one difference between an element and a mixture of elements
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Chemistry, 22.06.2019 21:30
In one or two grammatically correct sentences, write a definition for the term molecule geometry
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