Up quark
A proton contains two up quarks and one down quark, while a neutron has one up and two down quarks. This topic is part of Particle Physics within Science & Nature. This page currently draws on 5 supporting questions, with answers and bonus facts available below.
Up quark trivia questions
An up quark is one of the basic building blocks of which particles?
Answer: Protons and neutrons
Bonus fact: Ordinary atomic nuclei are built from protons and neutrons, which in turn are made of up and down quarks.
What electric charge does an up quark carry?
Answer: Positive two-thirds of the elementary charge
Bonus fact: Fractional quark charges combine to produce the whole-number charges of protons and neutrons.
How many up quarks are found in a proton?
Answer: Two
Bonus fact: A proton contains two up quarks and one down quark, while a neutron has one up and two down quarks.
Down quarks combine with up quarks to form which familiar particles?
Answer: Protons and neutrons
Bonus fact: Up and down quarks make up nearly all the ordinary matter in atomic nuclei.
How many down quarks are in a neutron?
Answer: Two
Bonus fact: A neutron is made of one up quark and two down quarks.