<P> Lithium - 4 contains three protons and one neutron . It is the shortest - lived known isotope of lithium , with a half - life of about 91 yoctoseconds , 6977909999999999999 ♠ 9.1 × 10 seconds and decays by proton emission to helium - 3 . Lithium - 4 can be formed as an intermediate in some nuclear fusion reactions . </P>
<P> Lithium - 4 contains three protons and one neutron . It is the shortest - lived known isotope of lithium , with a half - life of about 91 yoctoseconds , 6977909999999999999 ♠ 9.1 × 10 seconds and decays by proton emission to helium - 3 . Lithium - 4 can be formed as an intermediate in some nuclear fusion reactions . </P>
how many protons are in a lithium nucleus
how many protons are in a lithium nucleus
three
three