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An atom is electrically neutral because
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
Which statement below accurately describes the contributions of Thomson?
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
In Rutherford's experiments, most of the alpha particles
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
A positively charged particle with mass 1.673 x 10^–24 g is a(n)
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
Which of the statements about the discovery of electrons is FALSE?
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
Because most particles fired at metal foil passed straight through, Rutherford concluded that
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
In Rutherford's experiments, alpha particles
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
Because a few alpha particles bounced back from the foil, Rutherford concluded that they were
b. passed through the foil.
discovered the existence of electrons
Rutherford proved the plum-pudding model correct.
c. proton
d. were used to bombard thin metal foil.
c. repelled by densely packed regions of positive charge.
c. the numbers of protons and electrons are equal.
a. atoms were mostly empty space.
Check it!