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J. J. Thomson used the fact that ______ charges attract each other in his cathode-ray tube experiment.
metals
8
atomic number
opposite
brittle
127
physical change
same
Elements that can be pounded into thin sheets are
metals
8
atomic number
opposite
brittle
127
physical change
same
Most nonmetals are
metals
8
atomic number
opposite
brittle
127
physical change
same
How many valence electrons does Krypton have?
metals
8
atomic number
opposite
brittle
127
physical change
same
Each atom of protium has 1 proton, 0 neutrons and 1 electron. Each atom of deuterium has 1 proton, 2 neutrons and 1 electron. Are these the same or different elements?
metals
8
atomic number
opposite
brittle
127
physical change
same
What is the atomic mass of Iodine?
metals
8
atomic number
opposite
brittle
127
physical change
same
Melting the butter results in ____.
metals
8
atomic number
opposite
brittle
127
physical change
same
In the modern periodic table (ours) the elements are arranging in order of increasing
metals
8
atomic number
opposite
brittle
127
physical change
same
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