4. which hypothesis led to the discovery of the proton?
a. cathode rays should be attracted to...
4. which hypothesis led to the discovery of the proton?
a. cathode rays should be attracted to a positively-charged plate.
b. the nucleus of an atom should contain neutrons.
c. when a neutral hydrogen atom loses an electron, a positively-charged
particle should remain.
d. a proton should be 1840 times heavier than an electron.
Answers: 3
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Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine
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Enzymes affect the reactions in living cells by changing the
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