7. An alpha particle that is emitted as nuclear radiation has the same structur a. hydrogen nucleus. b. helium nucleus. c. neutron. d. electron.

The correct answer is b. helium nucleus.An alpha particle is a type of nuclear radiation that is emitted during certain types of radioactive decay. It consists of two protons and two neutrons, which is the same as the nucleus of a helium atom. Therefore, an alpha particle has the same structure as a helium nucleus.