5 Written Questions
5 Matching Questions
- Mass number
- Law of Definite Proportions
- Avogadro's number
- Atomic Number
- a the sum of the numbers of protons and neutrons in the nucleus of an atom
- b 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
- c number of representative particles in a mole, 6.02 X 10^23
- 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
- negatively charged particles found outside the nucleus
- atom of an element that has a number of neutrons different from that of other atoms of the same element
- the mass in grams of 1 mol of a substance
- 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.
- a powerful force of attraction that binds protons and neutrons together in the nuleus
5 True/False Questions
Neutron → a subatomic particle that has no charge and that is found in the nucleus of an atom
Plum Pudding Model of the atom → created by Ernest Rutherford. Replaced the Plum Pudding Model. Atom is like a miniature solar system with the positive particles in the middle and the negative particles orbiting as the planets do around the center.
Law of Conservation of Mass → the weighted average of the atomic masses of the naturally occurring isotopes of an element
James Chadwick → confirmed the existence of the neutron
Dalton's Atomic Theory → number of representative particles in a mole, 6.02 X 10^23