1. Check for Understanding
Valence Electrons

2. How many valence electrons does sodium (Na) have?

3. 1 valence electron

4. How many valence electrons does fluorine (F) have?

5. 7 valence electrons

6. How many valence electrons does silicon (S) have?

7. 4 valence electrons

8. How many valence electrons does xenon (Xe) have?

9. 8 valence electrons

10. Chlorine (Cl) has the most similar chemical properties as: a) Neon b) Sodium c) Iodine d) Calcium

11. Chlorine (Cl) has the most similar chemical properties as: a) Neon b) Sodium c) Iodine d) Calcium
Chlorine and Iodine both have 7 valence electrons, and are therefore in the same family and have similar chemical properties.

12. Barium (Ba) has the most similar chemical properties as: a) Argon b) Magnesium c) Oxygen d) Lithium

13. Barium (Ba) has the most similar chemical properties as: a) Argon b) Magnesium c) Oxygen d) Lithium
Barium and magnesium both have 2 valence electrons, and are therefore in the same family and have similar chemical properties.