5 Written questions
5 Matching questions
- Scanning Tunneling Microscopes(STM)
- Avogadro's number
- Atomic Number
- Gold Foil experiment
- a Conducted by Ernest Rutherford in which alpha particles that were shot at gold foil were deflected when they hit the positive center of gold atoms. The nucleus was discovered as a result of this experiment.
- b number of representative particles in a mole, 6.02 X 10^23
- c negatively charged particles found outside the nucleus
- d Uses a needle-like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed
- e The number of protons in the nucleus of an atom.
5 Multiple choice questions
- a powerful force of attraction that binds protons and neutrons together in the nuleus
- the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
- evacuated glass tube in which a stream of electrons emitted by a cathode strikes a fluorescent material, causing it to glow(used to discover the electron)
- the weighted average of the atomic masses of the naturally occurring isotopes of an element
- if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers
5 True/False questions
Nucleus → the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
J J Thompson → 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
Mass number → The number of protons in the nucleus of an atom.
Relative Atomic Mass → the weighted average of the atomic masses of the naturally occurring isotopes of an element
Proton → atom of an element that has a number of neutrons different from that of other atoms of the same element