Question

according to the periodic table of the elements, which set of elements has similar properties?
a h, c, i
b na, ca, al
c he, h, al
d he, ne, ar

Explanation:

Elements in the same group (vertical column) of the periodic table have similar properties. He (Helium), Ne (Neon), and Ar (Argon) are all noble gases in Group 18. They have full valence electron shells, making them chemically inert (unreactive).

• Option A: H (Hydrogen) is in Group 1, C (Carbon) is in Group 14, and I (Iodine) is in Group 17. Different groups, different properties.
• Option B: Na (Sodium) is in Group 1, Ca (Calcium) is in Group 2, and Al (Aluminum) is in Group 13. Different groups, different properties.
• Option C: He (Helium) is in Group 18, H (Hydrogen) is in Group 1, and Al (Aluminum) is in Group 13. Different groups, different properties.

Answer:

D. He, Ne, Ar