History of Atom Structure PreLess

In the late 1980s, a British scientist called __________ discovered the electron

• J.J. Thomson
• Charles Darwin
• Ernest Rutherford

• James Chadwick

Thompson's idea for atom model was

• chocolate chip model
• strawberry shortcake model
• plum pudding model
• blueberry muffin model

Why was Thompson's model of atom was also known as 'plum pudding model'?

• Because it depicts the protons as negatively-charged particles embedded in a sea of positive charge

• Because it depicts the electrons as negatively-charged particles embedded in a sea of positive charge

• Because it depicts the neutrons as negatively-charged particles embedded in a sea of positive charge

• Because it depicts the electrons as positively-charged particles embedded in a sea of negative charge

In the 'plum pudding model', the plum represents the ____________ and the plum represents the ___________

• electrons, negative charge
• neutrons, neutral charge
• electrons, positive charge
• protons, negative charge

Ernest Rutherford discovered the _________ and ________

• nucleus and proton

• atom and molecule
• photon and electron
• electron and neutron
• proton and neutron

What is Rutherford’s most famous experiment?

• Silver foil experiment
• Copper foil experiment
• Aluminum foil experiment
• Gold foil experiment

What Rutherford did in the gold foil experiment?

• He conducted experiments with X-rays and their effect on photographic plates
• He observed the behavior of electrons in a cathode ray tube
• He studied the behavior of light in a double-slit experiment
• He bombarded a thin sheet of gold foil with alpha particles.

In the gold foil experiment, the idea of alpha particles passing through the gold foil shows

• The gold foil absorbs all the alpha particles
• Alpha particles are repelled by the gold foil
• The gold foil causes the alpha particles to change direction
• Most of the space inside an atom is empty, with a small, dense nucleus at the center.

In the gold foil experiment, the idea of alpha particles deflected by small angles shows

• The dense nucleus is positively charged

• The uniform distribution of positive charge throughout the atom
• The inability of alpha particles to penetrate the gold foil
• The absence of a nucleus in the atom

Who discovered the existence of neutrons in an atom?

• James Chadwick
• Albert Einstein
• J.J Thompson

• Ernest Rutherford