Which element is a halogen and has a larger average atomic mass than arsenic (As)? (3 points)Selenium (Se)Iodine (I)Strontium (Sr)Chlorine (Cl)

The element that is a halogen and has a larger average atomic mass than arsenic (As) is Iodine (I).

Here's the step by step process:

1. Identify the halogens from the given options. Halogens are group 17 elements on the periodic table. From the options given, Selenium (Se), Iodine (I), and Chlorine (Cl) are halogens. Strontium (Sr) is not a halogen.

2. Compare the atomic masses. The atomic mass of arsenic (As) is approximately 74.92 atomic mass units (amu).

3. Check the atomic masses of the identified halogens. The atomic mass of Selenium (Se) is approximately 78.96 amu, Iodine (I) is approximately 126.90 amu, and Chlorine (Cl) is approximately 35.45 amu.

4. From the comparison, only Iodine (I) has a larger atomic mass than arsenic (As). Therefore, Iodine (I) is the correct answer.