Which of the following set of elements is written in order of their increasing metallic character?
A. Be, Mg, Ca
B. Na, Li, K
C. Mg, Al, Si
D. C, O, N
Answer:A
Which of the following set of elements is written in order of their increasing metallic character?
A. Be, Mg, Ca B. Na, Li, K C. Mg, Al, Si D. C, O, N
Explanation: As we move down in a group, the metallic nature of elements increases. Be, Mg, and Ca are present in the same group (group 2 of the modern periodic table). Thus, Ca has the highest metallic character.