Grade 10 Science Chemistry Key Terms

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Across
  1. 3. The positively charged sub-atomic particle in the nucleus is a ______
  2. 5. A diagram that shows the entire electron arrangement of an atom is called a ___ diagram
  3. 9. An atom is always _______
  4. 10. The smallest particle of an element that retains the properties of an element is called an ____
  5. 11. Protons + ________ = atomic mass
  6. 12. The outermost shell that contains electrons is called the ____________
  7. 15. A column of the periodic table is called a ______
  8. 16. The arrangement of having 8 electrons in the outermost shell is called a ___________
  9. 17. A row of the periodic table is called a ______
Down
  1. 1. An ion always has a ______
  2. 2. The neutron helps _________ the nucleus
  3. 4. The number of protons _______ always equal the number of neutrons in an atom
  4. 6. An atom that has lost electrons to become positively charged is a ______
  5. 7. A diagram that shows only the valence electrons in called a _____ diagram
  6. 8. The number of protons equals the ____________ on the period table
  7. 9. An anion is an atom that has gained electrons to become __________ charged
  8. 13. To be neutral an atom's number of electrons must be ______ to the number of protons
  9. 14. The negatively charged sub-atomic particle that orbits the nucleus is called an ________