5 Written questions
5 Matching questions
- J J Thompson
- Plum Pudding Model of the atom
- Atomic Number
- a 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
- b a subatomic particle that has a positive charge and that is found in the nucleus of an atom
- c atoms are balls of positively charged material with negative electrons scattered throught
- d the smallest particle of an element that retains its identity in a chemical reaction
- e The number of protons in the nucleus of an atom.
5 Multiple choice questions
- the mass in grams of 1 mol of a substance
- the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
- negatively charged particles found outside the nucleus
- 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.
- confirmed the existence of the neutron
5 True/False questions
Scanning Tunneling Microscopes(STM) → a powerful force of attraction that binds protons and neutrons together in the nuleus
Law of Multiple Proportions → the fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound
Relative Atomic Mass → a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)
Isotope → atom of an element that has a number of neutrons different from that of other atoms of the same element
Average Atomic Mass → a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)