1. Who of the following scientists discovered the negatively- charged particles of an atom?
a. Ernest Rutherford
c. Joseph James. Thomson
b. James Chadwick
d. Joseph John. Thomson
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1. Who of the following scientists discovered the negatively- charged particles of an atom?
a. Ernest Rutherford
c. Joseph James. Thomson
b. James Chadwick
d. Joseph John. Thomson
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d.Joseph John. Thomson
Explanation:
Joseph John Thomson's experiments with
cathode ray tubes showed that all atoms
contain tiny negatively charged
subatomic particles or electrons.
Thomson proposed the plum pudding
model of the atom, which had negatively-
charged electrons embedded within a
positively-charged "soup."
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