Atoms Element Compound

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Across
  1. 3. Number which shows the amount of proton
  2. 7. Negative charged sub-atomic particle
  3. 10. Carbon which used in pencil and lubricant
  4. 11. Electrostatic bond between cation and sea of electron
  5. 13. Impure substance which is the combination of pure substance physically
  6. 14. Negative ion
  7. 15. The center of atom which consist of proton and neutron
  8. 17. Pure substance which has more than one kind of element
  9. 18. Cation is formed when atom ... electron
  10. 20. Number which shows the sum of proton and neutron
  11. 21. Neutral charged sub-atomic particle
  12. 22. Positive charged sub-atomic particle
Down
  1. 1. Carbon which the structure is giant covalent which has 4 bonding each
  2. 2. The outermost electron is called ... electron
  3. 4. Two atoms which have similar proton but different neutron
  4. 5. Bond formed between metal and nonmetal
  5. 6. Atoms are forming bond to achieve the configuration of ... gases
  6. 8. Pure substance which has one kind of atom only
  7. 9. The horizontal line on periodic table which come from number of shells
  8. 10. Anion is formed when atom ... electron
  9. 12. Electron is located ... of the nucleus
  10. 16. Bond formed by sharing electron
  11. 17. Positive ion
  12. 19. The vertical line on periodic table which come from valence electron