Question

which element has the greatest number of valence electrons available for bonding?
selenium
boron
calcium
chlorine

Explanation:

Boron (Group 13), Calcium (Group 2), Chlorine (Group 17)

Step2: Get valence electrons per group

Group 16: 6, Group13:3, Group2:2, Group17:7

Step3: Compare valence electron counts

$7 > 6 > 3 > 2$

Answer:

Boron (Group 13), Calcium (Group 2), Chlorine (Group 17)

Step2: Get valence electrons per group

Group 16: 6, Group13:3, Group2:2, Group17:7

Step3: Compare valence electron counts

$7 > 6 > 3 > 2$