Question Detail
Question
Which of the following Group 1 elements is mentioned to form simple oxides (O²⁻ ion) exclusively?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Page 8 states, 'Lithium and sodium form simple oxides which contain the common O²⁻ ion.' And page 9 clarifies that at the top of the group, small ions only form simple oxides.
Hint
Small ions at the top of the group tend to form simple oxides.