A proton consists of two \"up\" and one \"down\" particle Refer to their propert

Question

A proton consists of two "up" and one "down" particle Refer to their properties in Table 2 to calculate the net electric charge and spin of a proton. 6. A is a particle with a spin in halt-amounts of h (such as 1/2, 3/2 etc.). whereas a "boson" is a particle with a spin in terms of integers (such as 0, I. 2 etc.). Indicate from the following list which panicle is a and which is a boson. 7. A neutron consists of one "up" and two "down" particles, (a) Show that a neutron has no electric charge. (b) Is a neutron a or a boson? Briefly defend your answer.

Explanation / Answer

5.

Proton's charge = 1.6 x 10-19 C

Proton's Spin = 1/2

6.

Elecron: Fermion

Photon: Boson

Neutrino: Fermion

Proton: Fermion

7a.

Quarks carry fractional electrical charges. An 'up' quark has a charge of +2/3 and a 'down' quark has a charge of -1/3. A neutron has two 'down' quarks and one 'up' quark, so it has a total charge of (-1/3) + (-1/3) + (+ 2/3) = 0.

7b.

A baryon, such as the neutron, contains three fermionic quarks and thus it is a fermion.

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