Rubidium (Rb) has two isotopes. Using the data in the table below, calculate the relative atomic mass of Rb. Give your answer to 3 significant
figures.

85.6

Explanation:

(72 x 85) + (28 x 87)

        100

= 85.56

= 85.6 (3 s.f.)

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.