The mass number for an isotope is 211. The number of neutrons is 1.51 times higher than number of protons. Show your work and solve for number of protons and identify the element.

84 protons

Explanation:

atomic mass = # of protons + # of neutrons ( number of P is unknown )

      211        =     P + 1.15 P

      211         =    2.15 P  ( solving a linear equation )

           so we find that the number of protons = 84

its the polonium isotope

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

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.