identify the number of valence electrons found in each element

Explanation:

Step1: Recall valence - electron rules

Valence electrons can be determined by the group number in the periodic table (for main - group elements).

Step2: Determine valence electrons for Al

Aluminum (Al) is in group 13. It has 3 valence electrons.

Step3: Determine valence electrons for C

Carbon (C) is in group 14. It has 4 valence electrons.

Step4: Determine valence electrons for Ne

Neon (Ne) is a noble gas in group 18. It has 8 valence electrons.

Step5: Determine valence electrons for K

Potassium (K) is in group 1. It has 1 valence electron.

Step6: Determine valence electrons for S

Sulfur (S) is in group 16. It has 6 valence electrons.

Step7: Determine valence electrons for Br

Bromine (Br) is in group 17. It has 7 valence electrons.

Step8: Determine valence electrons for P

Phosphorus (P) is in group 15. It has 5 valence electrons.

Step9: Determine valence electrons for Ca

Calcium (Ca) is in group 2. It has 2 valence electrons.

Answer:

Al: 3 C: 4 Ne: 8 K: 1 S: 6 Br: 7 P: 5 Ca: 2