Table of Elements

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Across
  1. 2. a chemical element with the symbol B and atomic number 5.
  2. 3. the chemical element with the symbol H and atomic number 1.
  3. 4. It is abundant, multivalent and nonmetallic.
  4. 6. It was first isolated from potash, the ashes of plants, from which its name derives.
  5. 10. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.
  6. 11. It is a noble gas.[10] Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
  7. 13. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure.
  8. 14. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table.
  9. 16. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.
  10. 18. It is a steel-gray, strong, lightweight and brittle alkaline earth metal.
  11. 19. It is the fifth most abundant element in Earth's crust, and the third most abundant metal, after iron and aluminum.
Down
  1. 1. It has a concentration in the Earth's crust of about one gram per kilogram (compare copper at about 0.06 grams).
  2. 5. It is the lightest halogen and exists at standard conditions as a highly toxic, pale yellow diatomic gas.
  3. 7. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.
  4. 8. It is in group 18 of the periodic table and is a noble gas.
  5. 9. It is a soft, silvery-white, highly reactive metal.
  6. 10. it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them.
  7. 12. it is the lightest metal and the lightest solid element.
  8. 15. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor.
  9. 17. It has a great affinity towards oxygen, and forms a protective layer of oxide on the surface when exposed to air.