Question

1. which list includes elements with the most similar chemical properties?

a) k, ca, sc
b) li, mg, mn
c) be, mg, ca
d) c, n, o

Explanation:

Step1: Recall periodic table trends

Elements in the same group have similar chemical properties.

Step2: Analyze each option

• Option a: K (Group 1), Ca (Group 2), Sc (Group 3) - Different groups.
• Option b: Li (Group 1), Mg (Group 2), Mn (Group 7) - Different groups.
• Option c: Be (Group 2), Mg (Group 2), Ca (Group 2) - Same group (Alkaline earth metals).
• Option d: C (Group 14), N (Group 15), O (Group 16) - Different groups.

Answer:

C. Be, Mg, Ca