1- 234/92 U undergoes alpha decay. What is the atomic number of the resulting element? Express your answer numerically as an integer.
2- Calculate the binding energy E B of the helium nucleus 4 /2 He .Express your answer in millions of electron volts to four significant figures.
3- Calculate the binding energy per nucleon of the helium nucleus 4 / 2 He .Express your answer in millions of electron volts to four significant figures.