- Complete the following table
| Name | Lithium | Fluorine | Neon |
| Arrangement of electrons in energy levels | 2,8,7 | ||
| Number of electrons in first energy level | 2 | ||
| Number of valence electrons | 1 |
Draw 3 diagrams of the orbital structure of Li, F and Ne
2. Identify the type of bonding in the following compunds:
Hydrogen H2
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Water H2O
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Zinc Nitrate Zn(NO3)2
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Aluminium Oxide Al2 O3
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Sodium Chloride NaCl
Carbon Dioxide CO2
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Mercury Hg
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Atomic Number and Valence Electrons
3. Complete the following table
| Atomic Number | Number of Protons | Number of Electrons | Positive or Negative ion | Ion Symbol |
| 1 | 1 | 0 | Positive | H+ |
| 9 | 9 | |||
| 19 | K+ | |||
| 12 | Mg2+ | |||
| 8 | 10 | |||
| 16 | Negative |