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In Rutherford's experiments, most of the alpha particles
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
Because a few alpha particles bounced back from the foil, Rutherford concluded that they were
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
Which statement below accurately describes the contributions of Thomson?
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
A positively charged particle with mass 1.673 x 10^–24 g is a(n)
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
A nuclear particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
In Rutherford's experiments, alpha particles
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
Because most particles fired at metal foil passed straight through, Rutherford concluded that
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
An atom is electrically neutral because
b. neutron.
c. repelled by densely packed regions of positive charge.
d. were used to bombard thin metal foil.
discovered the existence of electrons
a. atoms were mostly empty space.
c. proton
c. the numbers of protons and electrons are equal.
b. passed through the foil.
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