Question

A deuterium nucleus consists of one proton and one neutron. The quark composition of a deuterium nucleus is

A- 2 up quarks and one down quark
B- 2 up quarks and 4 down quarks
C- 3 up quarks and 3 down quarks
D -4 up quarks and 2 down quarks

Answer 1

Option (c)

Step-by-step explanation:

One up quark =
`+(2e)/(3)`

One down quark =
`-(e)/(3)`

One proton is having one e charge.

The quark composition of proton is 2 up quark and one down quark.

The quark composition of neutron is one up quark ad two down quark.

Thus, the quark composition of nucleus of deuterium is

2 up quark and one down quark + one up quark and two down quark

So, it is 3 up quark and 3 down quark.

Answer 2

The quark composition of a deuterium nucleus is 3 up quarks and 3 down quarks. The overall charge of the deuterium nucleus is +1. Comparing  the given overall charge to the chart of the Particles of the Standard  Model, the overall charge can be determined from the combinations from the choices. Among them, only C gives the correct overall charge.