Atomic Nucleus and Neutrons Quiz

What was the primary focus of the lesson on atomic nucleus and neutrons?

• The discovery of isotopes

• The discovery of protons

• The discovery of the atomic nucleus and neutrons

• The discovery of electrons

What did Rutherford's gold foil experiment demonstrate about the structure of an atom?

• Atoms have no central mass

• Atoms are solid and dense

• Atoms are mostly empty space

• Atoms are composed of only electrons

According to Rutherford's atomic model, where is the positive charge of an atom located?

• In the outer shell

• In the nucleus

• In the empty space

• In the electrons

What was one of the limitations of Rutherford's atomic model?

• It could not explain the mass of an atom

• It could not explain the existence of protons

• It could not explain the existence of electrons

• It could not explain the stability of an atom

What did Rutherford's model fail to explain about electrons?

• Their charge

• Their mass

• Their speed

• Their arrangement in an atom

What discrepancy did scientists find in the mass of helium compared to hydrogen?

• Helium was found to be half the mass of hydrogen

• Helium was found to be the same mass as hydrogen

• Helium was found to be double the mass of hydrogen

• Helium was found to be four times the mass of hydrogen

Who discovered the neutron and in what year?

• James Chadwick in 1932

• Albert Einstein in 1905

• Niels Bohr in 1922

• Ernest Rutherford in 1911

What are neutrons and protons collectively known as?

• Isotopes

• Ions

• Electrons

• Nucleons

What is the role of neutrons in the nucleus?

• They provide a negative charge

• They stabilize the nucleus

• They orbit around the nucleus

• They emit radiation

What is the atomic mass of an element determined by?

• The number of protons and neutrons

• The number of electrons

• The number of protons only

• The number of neutrons only