Why the nucleus of an atom is positively charged ?
Give reasons.
(a) In Rutherford’s experiment, some alpha rays collide with the gold sheet and are turned back.
(b) During ion formation, an electric charge develops on the elements.
(c) Why does ionisation take place?
(d) In an atom, electrons do not fall into the nucleus even though they are negatively charged.
(e) All the mass of an atom is concentrated in the nucleus.
The nucleus of an iron atom is surrounded by negatively charged particles called protons.