( i need this asap) An unknown element has an isotope that has a mass of 120.903 amu with 57.4 % abundance and a second isotope with a mass of 122.9042 amu.

1. Remember % has to equal 100. What is the percent abundance of isotope two?

2. Find the atomic mass of the element.

3. Identify the identity.

Assignment directions: pick one of the following chemists and perform a bit of research on him/her. answer the following questions. alice hamilton             rosalind franklin marie curie             gertrude b. elion ada yonath             henry cavendish robert boyle             antoine lavoisier mario j. molina             svante arrhenius