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13 questions from this quiz
They are tiny spheres that cannot be divided
1897
A ball of positive charge with electrons in it
Gold
Positive
Most alpha particles passed straight through
Atoms are mainly empty space
Centre of atom has a positive charge
Centre contains a great deal of mass
They orbit at specific distances
James Chadwick
1×10−101 \times 10^{-10}1×10−10 m
Number of electrons equals number of protons
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