select the correct answer. which of these elements has four valence electrons? a. hafnium (hf) b. radon (rn)…
select the correct answer. which of these elements has four valence electrons? a. hafnium (hf) b. radon (rn) c. silicon (si) d. sulfur (s)
Answer
Explanation:
Step1: Recall valence - electron rules
Elements in group 14 of the periodic table have 4 valence electrons.
Step2: Identify group - 14 elements
Silicon (Si) is in group 14 of the periodic table. Hafnium (Hf) is in group 4, Radon (Rn) is in group 18, and Sulfur (S) is in group 16.
Answer:
C. silicon (Si)