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5 Written Questions

5 Matching Questions

  1. Relative Atomic Mass
  2. Strong Nuclear Force
  3. Nuclear Model of the atom
  4. Law of Multiple Proportions
  5. Quark
  1. a a powerful force of attraction that binds protons and neutrons together in the nuleus
  2. b a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)
  3. c 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
  4. d 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. e smaller particles that make up protons and neutrons

5 Multiple Choice Questions

  1. the weighted average of the atomic masses of the naturally occurring isotopes of an element
  2. The number of protons in the nucleus of an atom.
  3. number of representative particles in a mole, 6.02 X 10^23
  4. 1700s-1800s 1. elements are composed of tiny indivisible perticles called atoms 2. atoms of the same element are the same, and atoms of different elements are different 3. atoms can chemically combine in simple whole number ratiosto form compounds 4. chemical reactions occur when atoms are separated, joined or rearranged
  5. 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

5 True/False Questions

  1. James Chadwickconfirmed the existence of the neutron

          

  2. Molethe amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12

          

  3. Protona subatomic particle that has a positive charge and that is found in the nucleus of an atom

          

  4. Neutrona subatomic particle that has a positive charge and that is found in the nucleus of an atom

          

  5. Molar massthe mass in grams of 1 mol of a substance

          

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