C3 SR Quiz

Name

What is the electric charge of a neutron?

• a) +1
• b) -1
• c) 0
• d) 1/1850

What is the relative mass of a proton?

• a) 1
• b) -1
• c) 0
• d) 1/1850

Which statement best describes the size of the nucleus compared to the overall size of the atom?

• a) The nucleus is about half the size of the atom
• b) The nucleus is very small compared to the atom
• c) The nucleus is slightly smaller than the atom
• d) The nucleus is the same size as the atom.

Where is most of the mass of an atom located?

• a) In the electrons
• b) Evenly distributed throughout the atom
• c) In the nucleus
• d) In the neutrons

What does the mass number of an atom represent?

• a) The number of protons.
• b) The number of neutrons.
• c) The number of electrons.
• d) The number of protons + the number of neutrons.

Two isotopes of the same element have the same:

• a) Number of protons
• b) Number of neutrons
• c) Mass number
• d) Relative atomic mass

An atom of lithium has a mass number of 7 and an atomic number of 3. How many neutrons does it have?

• a) 3
• b) 4
• c) 7
• d) 10

Which subatomic particle determines the element to which an atom belongs?

• a) Electron
• b) Neutron
• c) Proton
• d) Nucleus

Why do some elements have a relative atomic mass that is not a whole number?

• a) Because the number of protons can vary.
• b) Because the mass of a neutron is slightly more than 1.
• c) Because the relative atomic mass is an average of the masses of its isotopes.
• d) Because the mass of an electron is very small.