There are 2 isotopes of gallium that occur naturally: 69Ga and 71Ga. the 69Ga atoms have a mass of 68.925581 amu and the 71Ga atoms have a mass of 70.924707 amu. What is the percent natural abundance for each isotope?

the answer for sodium is 0.186

the answer for rubidium is 0.251

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.