Week 6 Vocabulary

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Across
  1. 3. a horizontal row of the periodic table
  2. 4. the sum of the numbers of protons and neutrons present in the nucleus of an atom
  3. 8. the number of protons in the nucleus of an atom;the atomic number is the same for all atoms of an element
  4. 10. a subatomic particle that has a negative charge
Down
  1. 1. a substance that cannot be separated or broken down into simpler substances by chemical means
  2. 2. an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group
  3. 5. a subatomic particle that has a positive charge and that is located in the nucleus of an atom;the number of protons in the nucleus is the atomic number, which determines the identity of an element
  4. 6. the smallest unit of an element that maintains the properties of that element
  5. 7. a column in the periodic table of the chemical elements
  6. 9. a subatomic particle that has no change and that is located in the nucleus of an atom