Ajlas Assignment

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Across
  1. 2. Its found in milk for humans
  2. 3. the sum of the numbers of protons and neutrons present in the nucleus of an atom.
  3. 7. a column in the periodic table of the chemical elements
  4. 10. he property of an element that determines the number of other a ionic
  5. 12. (non metal) atomic number is 9
  6. 13. (non metal) atomic weight is 11
  7. 15. the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus.
  8. 18. a positive electric charge
  9. 20. a group of rare gases that include helium, neon, argon, krypton, xenon
  10. 21. has groups and periods
  11. 22. any of the six chemical elements that make up Group 1 (Ia) of the periodic table
  12. 23. inert gas
  13. 25. elements on the right of the periodic table
  14. 27. A neutral chemical substance is neither an acid nor an alkali
  15. 28. (non metal) chemical symbol is O
Down
  1. 1. an electron in an atom, ion, or molecule not associated with any single atom or a single covalent bond
  2. 4. (Metal) atomic weight is 56
  3. 5. (non metal) atomic weight is 4
  4. 6. subatomic particle that has a positive charge equal magnitude
  5. 8. The horizontal rows of the periodic table
  6. 9. neutral subatomic particle
  7. 11. monosaccharide sugar
  8. 14. inert gas
  9. 16. any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
  10. 17. the interatomic linkage that results from the sharing of an electron pair between two atoms.
  11. 18. a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.
  12. 19. (Metal) chemical symbol is TI
  13. 24. membrane-bound organelle that contains the cell's chromosomes
  14. 26. a negatively charged subatomic particle