ICSE Class 9 Answered
Expert Answer
Properties of the Three Basic Sub-Atomic Particles
| Particle | Electric Charge (C) | Atomic Charge | Mass(g) | Atomic Mass (Au) | Spin |
| Protons | +1.6022 x 10-19 | +1 | 1.6726 x 10-24 | 1.0073 | 1/2 |
| Neutrons | 0 | 0 | 1.6740 x 10-24 | 1.0078 | 1/2 |
| Electrons | -1.6022 x 10-19 | -1 | 9.1094 x 10-28 | .00054858 | 1/2 |
Standard Model's Elementary particle include followings
1) Six "flavors" of quarks which are as follows: bottom, top, strange, and charm, up, down.
2) Six types of leptons which are as follows : electron, electron neutrino, muon, neutrino, muon , tau neutrino, tau.
3) (force carriers) Twelve gauge bosons the photon of electromagnetism, the three W and Z bosons of the weak force, and the eight gluons of the strong force.
Example of composite particles -Two up quarks and one down quark make up a proton , While two protons and two neutrons make up the atomic nucleus of helium-4 . All hadrons are included in composite particles, a group composed of baryons (protons and neutrons are included as baryons) and mesons (pions and kaons are the examples of it ) all are examples of composite particles.
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