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5 Written questions

5 Matching questions

  1. Atomic Number
  2. Mass number
  3. Ernest Rutherford
  4. Cathode-ray-tube
  5. Proton
  1. a a subatomic particle that has a positive charge and that is found in the nucleus of an atom
  2. b from his gold foil expirments, he knew some substances give off + charged particles called alpha particles, most of the mass of an atom is in the nucleus, he reasoned that electrons in the atom are whirled around outside the nucleus, most of the atom is empty space
  3. c the sum of the numbers of protons and neutrons in the nucleus of an atom
  4. d 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. e The number of protons in the nucleus of an atom.

5 Multiple choice questions

  1. the smallest particle of an element that retains its identity in a chemical reaction
  2. the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
  3. atom of an element that has a number of neutrons different from that of other atoms of the same element
  4. a subatomic particle that has no charge and that is found in the nucleus of an atom
  5. 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.

5 True/False questions

  1. Plum Pudding Model of the atomcreated 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.

          

  2. Average Atomic Massthe weighted average of the atomic masses of the naturally occurring isotopes of an element

          

  3. Electronsnegatively charged particles found outside the nucleus

          

  4. James Chadwickthe sum of the numbers of protons and neutrons in the nucleus of an atom

          

  5. Relative Atomic Massthe weighted average of the atomic masses of the naturally occurring isotopes of an element

          

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