Neutron. We didn't know about them yet. Chadwick discovered them some time later.
The model of the atom with no subatomic particles is the Dalton model, proposed by John Dalton in the early 19th century. In this model, atoms were considered indivisible and the smallest building blocks of matter. Subatomic particles like protons, neutrons, and electrons were not discovered until much later.
The plums in the famous "plum pudding" model of the atom represented electrons, which are negatively charged subatomic particles.
John Dalton
No; an atom contain subatomic particles.
JJ Thomson discovered that atoms were not indivisible because he discovered that atoms contained negatively charged subatomic particles which he called electrons.
The atom contain subatomic particles as neutron, proton, electron.
The three subatomic models are the plum pudding model, the nuclear model, and the current model known as the quantum mechanical model. These models describe the structure of the atom and the arrangement of subatomic particles within it.
no an ion is a electrically charged atom
subatomic particles
protons, neutrons, and electrons are the subatomic particles involved with an atom
Neutron. We didn't know about them yet. Chadwick discovered them some time later.
Basically, atoms are made up of subatomic particles. Subatomic, sub- meaning smaller that, so subatomic particles means "a particle smaller than an atom". So It means that it is a particle within the atom.