PHY. SCI-QUIZ 5

It is the basic unit of an element.

• matter

• compound

• energy

• atom

Which of the following are not particles that make up an atom?

• proton

• neutron

• electron

• photon

He proposed that the electrons orbit around the nucleus in set energy levels.

• Neils Bohr

• John Dalton

• JJ thompson

• Ernest Rutherford

Which of the following are true about the neutrons?

• The neutron is found on the space surrounding the nucleus.

• The neutron is found together with the protons inside the nucleus.

• The neutron is a positively charged particle.

• The neutron was proven to exist by James Chadwick.

Why did Niels Bohr disprove Rutherford's model?

• Rutherford’s model showed that the electrons and nucleus have opposite charges thus, the electrons would collapse into the nucleus, making the atom unstable.

• Rutherford's model of the electrons as negatively charged and the nucleus as positively charged were inconclusive.

• Rutherford's model was based on assumptions.

• Rutherford's model showed that the electrons freely move within the nucleus.