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Valence Electrons and the Periodic Table Chemistry Homework Worksheet - Free Printable

Educational worksheet: Valence Electrons and the Periodic Table Chemistry Homework Worksheet. Download and print for classroom or home learning activities.

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1. Valence electrons are the electrons in the outermost shell of an atom, involved in chemical bonding. Other electrons are inner-shell electrons not typically involved in bonding.
2. Carbon has 4 valence electrons; nitrogen has 5. Carbon tends to form 4 bonds to complete its octet, while nitrogen forms 3 bonds and retains a lone pair.
3. Li: 1, Be: 2, B: 3, C: 4, N: 5, O: 6, F: 7, Ne: 8
4. Na: 1, Mg: 2, Al: 3, Si: 4, P: 5, S: 6, Cl: 7, Ar: 8
5. Number of valence electrons:
- Group 1: 1
- Group 2: 2
- Group 13: 3
- Group 14: 4
- Group 15: 5
- Group 16: 6
- Group 17: 7
- Group 18: 8

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