5 Written questions
5 Matching questions
- Atomic Number
- Strong Nuclear Force
- J J Thompson
- a smaller particles that make up protons and neutrons
- b 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
- c a powerful force of attraction that binds protons and neutrons together in the nuleus
- d The number of protons in the nucleus of an atom.
- e 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)
5 Multiple choice questions
- atom of an element that has a number of neutrons different from that of other atoms of the same element
- atoms are balls of positively charged material with negative electrons scattered throught
- the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
- the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
- the smallest particle of an element that retains its identity in a chemical reaction
5 True/False questions
Avogadro's number → The number of protons in the nucleus of an atom.
Gold Foil experiment → the mass in grams of 1 mol of a substance
Scanning Tunneling Microscopes(STM) → 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
Ernest Rutherford → a subatomic particle that has no charge and that is found in the nucleus of an atom
Nucleus → the tiny, dense central portion of an atom, composed of protons and neutrons