An unknown element has two stable isotopes. 92.41 percent of

Last updated: 7/10/2022

An unknown element has two stable isotopes. 92.41 percent of all atoms of this element have a mass number of 7. The remaining 7.59 percent of atoms of this element have a mass number of 6. Which of the following is MOST LIKELY to be true about the average atomic mass of the unknown element? a The average atomic mass is slightly lower than 7 but much higher than 6. b The average atomic mass is 6.5 C The average atomic mass is slightly higher than 6 but much lower than 7. d There is no way to estimate the average atomic mass without knowing the identity of the element.