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