What type of galaxy is this
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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 13:30
How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
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Chemistry, 22.06.2019 15:20
Which description best characterizes the motion of particles in a solid?
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Chemistry, 22.06.2019 18:00
Heat is the total potential energy of a substance that can be transferred. true false
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