Q.1
What is the relative charge of a neutron?
  • +1
  • -1
  • 0
  • -10
Q.2
What is the relative mass of a proton?
  • +1
  • -1
  • 0
  • +10
Q.3
Atoms of an element always have the same number of protons but can have a different number of what?
  • Atomic numbers
  • Electron masses
  • Proton masses
  • Neutrons
Q.4
A neutral atom has five protons. How many electrons does it contain if it is not an ion?
  • 4
  • 5
  • 10
  • 1
Q.5
What is an atom called which has lost an electron?
  • Ion
  • Baryon
  • Quark
  • Oxygen
Q.6
What is the relative mass of an electron?
  • +1
  • -1
  • 0
  • +10
Q.7
What is the relative charge of a proton?
  • +1
  • -1
  • 0
  • +10
Q.8
What is an atom?
  • An atom is made up of an electron
  • An atom is a particle consisting of a small central nucleus containing protons and neutrons surrounded by electrons
  • An atom is made up of molecules such as H2O
  • An atom is a particle consisting of a small central nucleus containing neutrons and electrons surrounded by protons
Q.9
What does an atom's atomic number represent?
  • The number of particles within an atom in its nucleus
  • The number of protons in an atom in its nucleus
  • The number of neutrons in an atom in its nucleus
  • The number of electrons in an atom in its nucleus
Q.10
If an atom has 3 electrons, how many protons does it contain?
  • 1
  • 2
  • 3
  • 4
0 h : 0 m : 1 s