The average atomic mass of naturally occurring rubidium is 85.468 amu. The two isotopes of naturally occurring rubidium are rubidium-85 which is 72.2% abundant
and rubidium-87 which is 27.8% abundant. A 20.56 g sample of a natural rubidium
sample contains a mixture of both isotopes. How many of the atoms in the mixture
are rubidium-85?

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

can you attach the

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )