Question

Using the table above, find the average atomic mass of the element. Then, using the periodic table, determine which element is shown.

Answer 1

Answer:

Chlorine

Explanation:

• The abundance of chlorine-35 is 75% and the abundance of chlorine-37 is 25%.
• Chlorine for example has two naturally occurring isotopes: Chlorine-35 and chlorine-37.
• Chlorine's atomic mass is 35.453 u.

Answer 2

Answer:

126.8, Iodine

Explanation:

mass ×abundance/100

(126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)

102.1+21.7+3=126.8

IODINE has an atomic mass of 126.8 or 126.9