GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2 up quarks and 1 down quark
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1 up quark and 2 down quarks
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1 up quark and 5 down quarks
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None of the above
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Detailed explanation-1: -We have already established that an electron is a fundamental particle, so it cannot be composed of quarks. A positron is an antiparticle to the electron. It has the same mass as an electron, but it has the opposite charge to an electron. Thus, it has a plus one charge.
Detailed explanation-2: -Neutrons contain one up quark and two down quarks. The nucleus is held together by the “strong nuclear force, ‘’ which is one of four fundamental fources (gravity and electromagnetism are two others).
Detailed explanation-3: -A proton is made of two Up quarks, with 2/3 positive charge each and one Down Quark with a negative 1/3 charge (2/3 + 2/3 +-1/3 = 1). A neutron is made up of two Down quarks with a negative 1/3 charge each and one Up quark with a positive 2/3 charge. (-1/3 +-1/3 + 2/3 = 0).
Detailed explanation-4: -Only two types of quark are necessary to build protons and neutrons, the constituents of atomic nuclei. These are the up quark, with a charge of +23e, and the down quark, which has a charge of −13e. The proton consists of two up quarks and one down quark, which gives it a total charge of +e.