isotopes of atoms a. are produced when atoms lose electrons b. behave the same chemically and physically but differ biologically from other isotopes c. are the same physically and biologically but differ from other isotopes chemically d. have the same number of protons but a different number of neutrons e. have the same number of neutrons but a different number of protons

​Isotopes of atoms d. ​have the same number of protons but a different number of neutrons.

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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.

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