Models of the Atom

Which scientist described a positively charged core (“nucleus”) in the middle of a lot of empty space?

• Chadwick

• Thomson

• Rutherford

• Bohr

According to the modern concept of the atom, which are located in the nucleus of an atom?

• electrons and protons

• protons only

• neutrons and electrons

• protons and neutrons

In the Bohr model, nicknamed "the solar system model", what are the electrons like?

• the sun

• the nucleus

• the planets

• the moon

In the Cathode Ray Tube experiment, magnets were used to bend light beam, resulting in the discovery that the light beam was flowing _______.

• protons

• electrons

• neutrons

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Which of the following would be the closest analogy to Dalton's model of the atom?

• solar system

• plum pudding

• marble

• a ripple in water standing still

JJ Thomson used a cathode ray tube and a magnet to show that there is a subatomic particle with this property:

• positive charge

• no electric charge

• negative charge

• wave properties

What analogy best compares to Bohr's model of the atom?

• marble

• plum pudding

• solar system

• ripple in water that isn't moving

Where did Thomson say the electrons were in the atom?

• Round the outside

• Evenly spaced throughout the positively charged atom

• At the center of the atom

What happened during Rutherford's gold foil experiment that prompted him to develop a new model?

• All of the particles he was shooting at the gold foil went straight through.

• All of the particles he was shooting at the gold foil bounced back at the source.

• Most of the particles he was shooting at the gold foil passed through but some bounced back towards the source

How do scientists know how atoms are structured?

• By looking at them under a microscope

• By running experiments that expose their properties

• By examining only the largest atoms

• By splitting them apart

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