Question

output: assess it! 1 of 4 1. which is not true about all of these elements? 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 output: assess it! 3 of 4 3. which two elements share similar properties?

Explanation:

Question 1

• Option A: The elements (O, S, Se, Te) are in Group 16 (6A) of the periodic table, so they are in the same group. This statement is true.
• Option B: Elements in the same group have the same number of valence electrons (6 for Group 16). This statement is true.
• Option C: The number of protons is the atomic number. O has 8, S has 16, Se has 34, Te has 52 protons—they are not the same. This statement is false.
• Option D: Elements in the same group share similar chemical properties. This statement is true.

Elements in the same group of the periodic table share similar properties. Oxygen (O) and Sulfur (S) are both in Group 16 (6A), so they have similar properties (same valence electrons, similar chemical behavior).

Answer:

C. They all have the same number of protons

Question 3

(Assuming typical periodic table knowledge, elements in the same group have similar properties. For example, O and S (both Group 16), S and Se, Se and Te, or O and S, O and Se, O and Te, etc. Let's use O and S as an example.)