1) Which of the following does the nucleus contain? a) protons and electrons b) protons and neutrons c) neutrons and electrons 2) Which of the following statements is correct? a) Protons have a positive charge and neutrons are negative b) Protons have a negative charge and electrons are positive c) Protons have a positive charge and electrons are negative 3) What is the atomic number? a) The number of atoms it contains b) The number of protons it contains c) The number of neutrons it contains 4) In an atom: a) number of protons = number of electrons b) number of protons = number of neutrons c) number of neutrons = number of electrons 5) A neutron has what charge? a) no charge b) positive c) negative 6) Carbon-14 is radioactive. What does it mean? a) Its protons are unstable b) Its electrons are unstable c) Its nucleus is unstable d) Its neutrons are unstable 7) What is the mass of an electron? a) 1 b) -1 c) very small (so small you can ignore it) 8) What is the charge on an electron? a) +1 b) -1 c) 0 9) What is the mass of a neutron? a) 1 b) -1 c) 0 10) What is the charge on a proton? a) +1 b) -1 c) 0 11) What is the mass of a proton? a) -1 b) Very small (so small you can ignore it) c) 1 12) What are isotopes? a) Atoms of the same element which have the same proton number but a different nucleon number. b) Atoms of the same element which have the same nucleon number but a different proton number. c) Atoms of the same element which have the same proton number but a different electron number. d) Atoms of the same element which have the same proton number but a different atomic number.

Leaderboard

Visual style

Options

Switch template

Continue editing: ?