Question

a. they are all in the same group
b. they all have the same number of valence electrons
c. they all have the same number of protons
d. they all share similar properties

1. which two elements share similar properties?

a. oxygen and sulfur
b. oxygen and nitrogen
c. oxygen and helium
d. oxygen and chlorine

Explanation:

To determine which two elements share similar properties, we use the periodic table's organization: elements in the same group (vertical column) have the same number of valence electrons and similar chemical properties.

• Option A: Oxygen (O) and Sulfur (S) are in Group 16 (Chalcogens). They have 6 valence electrons, so their properties are similar.
• Option B: Oxygen (Group 16) and Nitrogen (Group 15) are in different groups, so properties differ.
• Option C: Oxygen (Group 16) and Helium (Group 18, noble gas) are in different groups with distinct properties.
• Option D: Oxygen (Group 16) and Chlorine (Group 17) are in different groups, so properties differ.

Answer:

A. Oxygen and Sulfur