Science

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Across
  1. 1. A particle in the nucleus with no charge
  2. 5. Two or more atoms chemically bonded
  3. 7. Electrons in the outermost shell
  4. 9. The center of an atom
  5. 10. A shiny, conductive, malleable element
  6. 14. Same element but different number of neutrons
  7. 17. Gas Elements that are stable and non-reactive
  8. 18. The process of forming new substances
  9. 20. The smallest unit of matter
  10. 21. A vertical column on the periodic table
  11. 22. A positively charged particle
  12. 24. Level Levels where electrons move around the nucleus
  13. 25. A bond formed by sharing electrons
  14. 27. Number The number of protons in an atom
  15. 29. Bond A bond formed by transferring electrons
  16. 30. How easily an element reacts with others
Down
  1. 2. Region where an electron is most likely found
  2. 3. Mass The mass of an atom based on protons and neutrons
  3. 4. A mixture of metals
  4. 6. A pure substance made of one kind of atom
  5. 8. How strongly an atom attracts electrons
  6. 11. Uneven sharing of electrons causing partial charges
  7. 12. A negatively charged particle
  8. 13. The first element on the periodic table
  9. 15. A horizontal row on the periodic table
  10. 16. When a molecule has a positive and negative side
  11. 19. Another name for an electron level
  12. 23. A dull, brittle, non-conductive element
  13. 26. Angle Angle between bonded atoms in a molecule
  14. 28. Number Total number of protons and neutrons