A star ending its life with a mass of 16 times the mass of the Sun is expected to collapse, combining its protons and electrons to form a neutron...

A star ending its life with a mass of 16 times the mass of the Sun is expected to collapse, combining its protons and electrons to form a neutron star. Such a star could be thought of as a gigantic atomic nucleus. If a star of mass 16 multiplied by 1.99 multiplied by 1030 kg collapsed into neutrons (mn = 1.67 multiplied by 10-27 kg), what would its radius be?