Infra red radiation has the longest wavelength out of these choices, and hence the lowest frequency. Gamma radiation has the shortest wavelength and the highest frequency.

Correct Option: A

Infra red radiation has the longest wavelength out of these choices, and hence the lowest frequency. Gamma radiation has the shortest wavelength and the highest frequency.

The correct frequency order is radio waves < mocrowaves < x- rays < cosmic rays

Correct Option: A

The correct frequency order is radio waves < mocrowaves < x- rays < cosmic rays

Meson was discovered by Yukawa.

Correct Option: D

Meson was discovered by Yukawa.

An orbital is the area around an atom where the electron (or electrons) are most likely to be. (90-95% likely)

Correct Option: D

An orbital is the area around an atom where the electron (or electrons) are most likely to be. (90-95% likely)

In one of their most well-known experiments, which took place while Rutherford was a professor at the University of Manchester, the physicists beamed alpha particles at a thin sheet of gold foil. During the experiment, most of the particles passed through the gold foil onto the screen behind it, but some were deflected. Rutherford determined that the particles that made up the gold foil must consist mostly of empty space since most of the alpha particles passed through. However, some regions of the gold must have been too dense to allow the alpha particles through, and this heavy part of the atom was what Rutherford called the nucleus. He concluded that it was the nucleus that held most of the atom's mass.

Correct Option: B

In one of their most well-known experiments, which took place while Rutherford was a professor at the University of Manchester, the physicists beamed alpha particles at a thin sheet of gold foil. During the experiment, most of the particles passed through the gold foil onto the screen behind it, but some were deflected. Rutherford determined that the particles that made up the gold foil must consist mostly of empty space since most of the alpha particles passed through. However, some regions of the gold must have been too dense to allow the alpha particles through, and this heavy part of the atom was what Rutherford called the nucleus. He concluded that it was the nucleus that held most of the atom's mass.