In 1911, Hans Geiger and Ernest Marsden (working under Ernest Rutherford) conducted an experiment involving alpha particles and gold foil that led to the discovery of the nucleus in atoms. The nucleus of an atom accounts for...
A- most of the size and mass of the atom.
B- very little of the size and mass of the atom.
C- most of the atom\'s size but very little of its mass.
D- most of the atom\'s mass but very little of its size.

most of the atom\'s mass but very little of its size.

Explanation:

In Rutherford's gold foil experiment. experiment, he took a gold foil and bombarded it with alpha particles (positively charged particles).

Some of the particles deflected their path and a few of them returned straight back. From this he concluded that in an atom, a small positive charge exist in the centre.

He also concluded that an atom consist of a lot of empty space as most of the alpha particles passed without any deflection.

Hence, this experiment concluded that a small positively charged nucleus is present and there is a lot of empty space.