Periodic Table

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Across
  1. 4. A form of matter which has mass, occupies a volume, and flows to adopt the shape of its container.
  2. 5. Smallest unit of a compound that contains all the elements of a compound
  3. 10. Subatomic particle located on energy rings outside the nucleus; Negatively charged
  4. 12. Electrons are shared; Chemical bond between two non-metals
  5. 14. Electron on outermost energy ring; Outside the nucleus
  6. 16. A form of matter that has mass but no definite shape, and can be either compressed or expanded to fill an infinite volume.
  7. 17. Special mass unit for the mass of a subatomic particle
  8. 21. Chart that displays the information of all known elements according to their properties
  9. 24. Started the modern theory of atoms; approved Democritus' model of an invisible atom
  10. 25. Solid at room temperature; Good conductors of heat and electricity
  11. 26. Number of protons in an element
  12. 27. Horizontal row on the periodic table
  13. 28. Smallest component of an element
  14. 29. A chemical bond between oppositely charged ions that forms when a metal atom gives away an electron and a non metal takes an electron
  15. 30. Group 1 or 1a
  16. 31. Subatomic particle located in the nucleus; Positively charged
  17. 32. Scientist who discovered electrons
  18. 35. Group 17 or 7a
Down
  1. 1. Each element has an atomic _______ that usually consists of one or two letters
  2. 2. Neither solid nor good conductors; Not lustrous
  3. 3. Subatomic particle located in the nucleus; Neutral charge.
  4. 6. Greek scientist who named the atom "atoms" for indivisible
  5. 7. Have properties of both metals and non-metals
  6. 8. Item used by J.J. Thompson in his experiment to prove that atoms contain electrons
  7. 9. Vertical column on the periodic table
  8. 11. Pure substance; Cannot be broken down into another substance
  9. 13. Composed of protons and neutrons; Center of the atom
  10. 15. A measure of the attraction an atom has for electrons.
  11. 18. The total distance from an atom's nucleus to the outermost electron orbital.
  12. 19. A form of matter which has a definite shape and volume.
  13. 20. Atoms form _____ by gaining or losing electrons
  14. 22. Describes the likelihood of an element to forms bond with other elements
  15. 23. Atoms that contain the same number of protons but different number of neutrons
  16. 33. Group 18 or 8a
  17. 34. Mixture containing two or more metallic elements