The element gallium has only two naturally occurring

Last updated: 7/10/2022

The element gallium has only two naturally occurring isotopes: 69 Ga with a mass of 68.92557 amu and an abundance of 60.108% and 71 Ga with a mass of 70.9247 amu and an abundance of 39.892%. Calculate the atomic mass of gallium. Express your answer to four significant figures and include the appropriate units.