Question

Which of the following elements do not lose an electron easily?

• A. Na
• B. F
• C. Mg
• D. Cl

Answer 1

Answer: (B), (D)

The correct options are
B F
D Cl

Fluorine (F) and chlorine (Cl) have seven electrons in their outermost shell. These seven electrons are bound tightly by their nucleus. Also, as compared to sodium (Na) and magnesium (Mg), F and Cl have a tendency to gain an electron to achieve octet whereas Na and Mg being metals have tendency to lose electrons to gain octet. Hence, it is more difficult for F and Cl to lose an electron as compared to Na and Mg.