WAEC Chemistry 2010 Objective — Question 12
Question 12 of 49 from the West African Examinations Council (WAEC) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
Advertisement
Which of the following species correctly represents an ion of M with 13 protons and 10 electrons?
- A. A. 10M³⁺
- B. B. 10M³⁻
- C. C. 13M³⁺Correct
- D. D. 13M³⁻
Explanation
Since the atomic number (number of protons in the nucleus) of an element must remain 13, and there are fewer electrons (10) than protons (13), electrons have been lost. Thus, the element M will turn into a positive ion, 13M³⁺ (three electrons lost).
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.