Periodic Table of Elements

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Across
  1. 2. He arranged the elements into a pattern that showed how they reacted similarly.
  2. 3. an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals.
  3. 4. an element or substance that is not a metal.
  4. 7. He created his own periodic table of elements.
  5. 9. able to be drawn out into a thin wire.
  6. 10. a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
  7. 12. In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements.
  8. 17. any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table.
  9. 18. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
  10. 19. Lewis structures are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.
Down
  1. 1. Today's Periodic Table lists elements according to the increasing atomic number, while Mendeleev's Periodic Table lists elements according to the increasing atomic mass.
  2. 4. any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table.
  3. 5. A period 1 element is one of the chemical elements in the first row (or period) of the periodic table of the chemical elements.
  4. 6. any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table.
  5. 8. He suggested that electrons could only have certain classical motions: Electrons in atoms orbit the nucleus.
  6. 11. The protons and neutrons account for almost all of the mass of an atom.
  7. 13. a table of the chemical elements arranged in order of atomic number
  8. 14. any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table.
  9. 15. able to be hammered or pressed permanently out of shape without breaking or cracking.
  10. 16. an electron located in the valence shell