Who discovered protons?
Ernest Rutherford is credited with the discovery of the proton.
How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons?
Protons were discovered when the nucleus of atoms were discovered. Electrons were already known about, so when the nucleus was discovered, it was known that it had to contain positively charged particles: protons. The nucleus was discovered by Ernest Rutherford by shooting alpha particles (helium nuclei, basically helium without the electrons) at a thin sheet of gold. Most of the alpha particles went straight through, but some if them were scattered. Rutherford deduced that these…
Electron was the first subparticle discovered because it has a negative charge .later protons where discovered because using the foil method determined the protons existence .But because the neutrons are neutral and uncharged they where the last to be dicovered even though they take up almost all the mass of an atom
What part of Dalton's theory of was disproved when scientists discovered that atoms contain protons electrons and neutrons?
John Dalton believed that atoms were the fundamental building blocks of matter, and that they could not be created, destroyed or split. However he was wrong, because atoms are made out of subatomic particles such as Protons, Neutrons and Electrons - and later still, it was discovered Protons and Neutrons too are made of even smaller particles.