PERIODIC TABLE

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12345678910111213141516
Across
  1. 2. same elements that contains the same number of protons but different of of neutrons
  2. 4. atom donates electron to form positive ion
  3. 5. atom accepts electron to form negative ion
  4. 6. transfering of electrons is called as ____ bond
  5. 7. Fe is the symbol for...
  6. 8. an electron of an atom, located in the outermost shell of the atom
  7. 10. sharing of electrons is called as ____ bond
  8. 11. the number of protons
  9. 12. the periodic table is starting from ____ which has the atomic number of 1
  10. 14. group 18 is known as...
  11. 15. down the table
  12. 16. noble gasses is also known as ___ gas
Down
  1. 1. Na is a symbol of...
  2. 3. group 3 to 12 is called as ___ metals
  3. 5. elements in the periodic table are arranged by...
  4. 8. the atomic number of an element tells you the number of _____ in a neutral atom
  5. 9. number of protons + number of neutrons
  6. 11. across the table
  7. 12. group 17 is known as...
  8. 13. the elements in each group have the same number of electrons in the outer ___