Question

which of the following pairs of elements have the most properties in common?
a. fluorine and oxygen
b. fluorine and chlorine
c. sodium and neon
d. sodium and magnesium

Explanation:

Elements in the same group (vertical column) of the periodic table have similar properties. Fluorine (F) and chlorine (Cl) are both in Group 17 (halogens). Sodium (Na) is in Group 1, neon (Ne) in Group 18, magnesium (Mg) in Group 2, oxygen (O) in Group 16.

Answer:

B. Fluorine and chlorine