SPS1 Periodic Table

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Across
  1. 2. When an atom gains an electron. The excess charge comes from electrons
  2. 3. Atom with the same number of protons but different numbers of neutrons.
  3. 6. Vertical column in the periodic table
  4. 8. Basic unit of matter
  5. 9. A pure substance made of only one kind of atom. Cannot be broken down into a simpler substance.
  6. 10. A chart of the elements showing the repeating pattern of their properties
  7. 11. An atom or group of atoms that has a positive or negative charge.
  8. 12. A horizontal row of elements in the periodic table
  9. 14. A subatomic particle that has no charge and that is found in the nucleus of an atom. Has a mass of 1 AMU
  10. 16. A subatomic particle that has a negative charge. Found outside the nucleus. Mass of 0 AMU
  11. 17. another name for group
  12. 19. Model includes a nucleus with a positive electric charge. Negatively charged electrons moved in orbits around the nucleus.
  13. 21. an element that is solid at room temperature, a good conductor of heat and electricity, and generally is shiny; most metals are ductile and malleable
  14. 22. A unit of mass that measure the relative amounts of matter in atoms. (AMU)
  15. 23. model of atom in which the electrons seem to form a cloud as they move around the nucleus
Down
  1. 1. Electrons in the outermost energy, or electron shell. This determines how the atom will react chemically with other atoms.
  2. 2. an element that is typically dull in appearance and is a poor conductor of electricity. Many are gases at room temperature.
  3. 4. When an atom loses and electron. The excess charge comes from protons.
  4. 5. particles protons, neutrons, electrons
  5. 7. the weighted average of the masses of the isotopes of an element
  6. 12. A subatomic particle that has a positive charge and that is found in the nucleus of an atom. Has a mass of 1 AMU
  7. 13. Elements that have properties of both metals and nonmetals.
  8. 15. A region of space within an atom in which electrons with the same energy are generally located. Determined by the period the element is located on.
  9. 18. A representation of an object, process or system.
  10. 20. Equal to the total number of protons and neutrons in its atom.