PS.4; PS.3 Elements, Periodic Table and Bonding Vocabulary

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Across
  1. 4. A change of materials into another, new materials with different properties and one or more than one new substances are formed.
  2. 8. Made of one type of atom, cannot be separated
  3. 11. The positively charged subatomic particles in the nucleus of an atom.
  4. 13. Electron in the outer shell of an atom.
  5. 15. A type of chemical element that lacks the characteristics of a metal.
  6. 17. The numbers used to balance chemical equations placed in front of the chemical symbol or formula.
  7. 18. bonds The bond between metals and nonmetals that gain or lose electrons
  8. 19. Metals have a shiny appearance, are good conductors of heat and electricity,
  9. 20. A process that involves rearrangement of the molecular or ionic structure of a substance.
  10. 22. The vertical columns on the periodic table. There are 18.
  11. 24. Organizes all discovered elements into rows
  12. 25. A substance that is formed as a result of a chemical reaction. (to the right)
  13. 26. The number of protons in an element
Down
  1. 1. The man-made or laboratory made elements on the periodic table.
  2. 2. Starting materials in a reaction that undergo a chemical change to form a product. (to the left)
  3. 3. An atom or molecule with a net charge due to the loss or gain of one or more electrons.
  4. 5. The averaged number of protons and neutrons in an element.
  5. 6. The material involved in the change is structurally the same before and after the change.
  6. 7. The horizontal rows on the periodic table. There are 7.
  7. 9. The center of an atom that includes protons and neutrons.
  8. 10. Smallest unit of matter
  9. 12. A small number written at the bottom of the symbol. It depicts the number of atoms of the element present in the molecule.
  10. 14. formula An expression that shows the elements in a compound and the proportions of those elements.
  11. 16. An element whose properties are between those of metals and solid nonmetals
  12. 18. Forms of the same element that contain equal numbers of protons but different numbers of neutrons in the nucleus.
  13. 21. The bond between nonmetals that share electrons
  14. 23. The neutrally (no charge) subatomic particle in the nucleus of an atom.