Chemistry Review Crossword

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Across
  1. 2. # of protons + # of neutrons
  2. 4. Elements combine in such a way that each atom has a complete outer energy level, which is 8 for many elements.
  3. 6. Has properties of both metals and Nonmetals
  4. 8. Measure of the distance between the center of the nuclei of 2 ions that barely touch each other
  5. 10. When electrons move to a higher energy level they ____ energy
  6. 11. negatively charged particle in an atom
  7. 13. atoms of a given element that differ in the number of neutrons and consequently, in mass
  8. 14. The typical distance from the center of the nucleus to the outermost electron
  9. 15. First group of elements on the periodic table, they are extremely reactive with only one valence electron
  10. 16. When electrons move to a lower energy level they ____ energy.
  11. 19. electrons in the outermost energy level
  12. 20. If an atom gains electrons it becomes negatively charged
  13. 21. Number of protons in an element.
  14. 23. This elemental group has seven valence electrons and wants to gain an electron. The word means ‘salt formers’
  15. 25. chemical bond that involves the attraction between oppositely charged ions
  16. 27. subatomic particle that has a neutral charge
  17. 28. positively charged particle in an atom
Down
  1. 1. this elemental group has eight valence electrons and rarely react with other substances
  2. 3. Good conductors of heat and electricity, Shiny, Ductile and Malleable
  3. 5. measure of an atom’s attraction for another atom’s electrons
  4. 7. An atom that gains or loses an electron
  5. 8. anions are named by taking the root of the element name and applying what three letter suffix to the ending
  6. 9. __________ energy is the energy required to remove an electron from an atom
  7. 12. chemical bond that involves the sharing of electrons
  8. 17. the building blocks of all matter.
  9. 18. A fictional element, mined only in Wakanda, that is associated with the Black Panther
  10. 20. blends of two or more metals; also man-made materials
  11. 22. If the atom loses electrons, it becomes positively charged
  12. 24. Poor conductors of heat and electricity, Not ductile or malleable, Brittle and break easily, and Dull
  13. 26. model of small dense nucleus surrounded by orbiting electrons