WAEC Chemistry 2020 Objective — Question 42
Question 42 of 50 from the West African Examinations Council (WAEC) Chemistry 2020 Objective paper, with the correct answer and a full explanation.
Advertisement
The metallic bond in magnesium is stronger than that in calcium because magnesium has a A. larger atomic size B. smaller atomic size C. greater number of valence electrons D. lower melting point.
- A. larger atomic size
- B. smaller atomic sizeCorrect
- C. greater number of valence electrons
- D. lower melting point
Explanation
Since magnesium and calcium have the same number of valence electrons, the metallic bond is determined by their atomic size. The smaller the atomic size, the greater the metallic pull of bond; thus magnesium (smaller atomic size) has a stronger metallic bond.
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.