Alpha Scattering and Nuclear Model

What did scientists discover in 1897 about atoms?

• Atoms are tiny spheres that cannot be divided

• Atoms contain tiny negative particles called electrons

• Atoms are made of gold foil

• Atoms have a positive charge

What did the plum pudding model suggest about the structure of atoms?

• Atoms are mainly empty space

• Atoms have a positive charge in the center

• Atoms have negative electrons embedded in a ball of positive charge

• Atoms have a nucleus containing almost all of the mass

What did the Alpha scattering experiment reveal about the structure of atoms?

• Atoms are mainly empty space

• Atoms have a positive charge in the center

• Atoms have negative electrons embedded in a ball of positive charge

• Atoms have a nucleus containing almost all of the mass

What is the central part of an atom called?

• Nucleus

• Proton

• Neutron

• Electron

What did Niels Bohr propose about the orbit of electrons?

• Electrons orbit the nucleus at specific distances

• Electrons orbit the nucleus in a general area

• Electrons are embedded in a ball of positive charge

• Electrons are mainly empty space

What did scientists discover about the positive charge in the nucleus?

• It is due to positive particles called protons

• It is due to negative particles called electrons

• It is due to neutral particles called neutrons

• It is due to empty space

What did James Chadwick discover about the nucleus?

• It contains positive particles called protons

• It contains negative particles called electrons

• It contains neutral particles called neutrons

• It contains empty space

What is the charge of neutrons?

• Positive

• Negative

• Neutral

• Empty

What are the energy levels or shells called in an atom?

• Protons

• Neutrons

• Electrons

• Nucleus

What did the Alpha scattering experiment replace the plum pudding model with?

• Nuclear model

• Proton model

• Neutron model

• Electron model