Question

part of the periodic table is shown. using the information from the chart what is the atomic mass of chlorine? options: 17, 35.5, 26

Explanation:

Step1: Recall Atomic Mass Concept

Atomic mass of an element (on the periodic table) is the weighted average mass of its isotopes, usually shown below the symbol. For Chlorine (Cl), the atomic number is 17 (proton count), but atomic mass is different.

Step2: Identify Chlorine's Atomic Mass

From periodic table knowledge, Chlorine (Cl) has an atomic mass of 35.5. The option 17 is atomic number, 26 is incorrect. So the atomic mass is 35.5.

Answer:

35.5