WAEC Chemistry 2014 Objective — Question 12
Question 12 of 50 from the West African Examinations Council (WAEC) Chemistry 2014 Objective paper, with the correct answer and a full explanation.
Advertisement
How many lone pair(s) of electrons is present in HF?
- A. 0
- B. 1
- C. 2
- D. 3Correct
Explanation
In the formation of hydrogen fluoride, HF, one electron from hydrogen is covalently linked to one electron from fluorine. Fluorine has seven electrons in its outer shell, so the six un-used electrons form three lone pairs in HF.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.