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5 Written questions

5 Matching questions

  1. Gold Foil experiment
  2. J J Thompson
  3. Proton
  4. Isotope
  5. Dalton's Atomic Theory
  1. a 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.
  2. b 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
  3. c atom of an element that has a number of neutrons different from that of other atoms of the same element
  4. d 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
  5. e a subatomic particle that has a positive charge and that is found in the nucleus of an atom

5 Multiple choice questions

  1. atoms are balls of positively charged material with negative electrons scattered throught
  2. a subatomic particle that has no charge and that is found in the nucleus of an atom
  3. the mass in grams of 1 mol of a substance
  4. 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
  5. the sum of the numbers of protons and neutrons in the nucleus of an atom

5 True/False questions

  1. Law of Definite Proportionsif 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

          

  2. Molethe smallest particle of an element that retains its identity in a chemical reaction

          

  3. Electronsa subatomic particle that has no charge and that is found in the nucleus of an atom

          

  4. Strong Nuclear Forcefrom 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. Ernest Rutherfordfrom 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