Lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5 % ) and Li-7 (natural abundance 92.5 % ). Using circles to represent protons and squares to represent neutrons, draw the nucleus of each isotope. How many Li-6 atoms would be present, on average, in a 1000 -atom sample of lithium? | Numerade

There are only two naturally-occuring stable isotopes of carbon. The mass and natural abundance of one of them is listed in the table below. Use whatever data you need from the ALEKS Periodic Table to determine the identity, mass and natural abundance of the other isotope, and complete the table. Be sure your answers have the correct number of significant digits. isotope mass (amu) natural abundance 98.93% 13 C 13.003 1.07%

Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17 %, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%. Calculate the atomic mass of rubidium. | Numerade

there are only two naturally occuring stable isotopes of copper the mass and natural abundance of one of them is listed in the table below use whatever data you need from the aleks periodic 86711

the element boron has two stable isotopes boron 10 100129 u and boron 11 110093 u the periodic table reports a mass for boron as 10811 what is the natural abundance of each boron isotope

The 235 U isotope undergoes fission when bombarded with neutron... | Filo