Down quark
Up and down quarks make up nearly all the ordinary matter in atomic nuclei. 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.
Down quark trivia questions
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.
What electric charge does a down quark carry?
Answer: Negative one-third of the elementary charge
Bonus fact: The fractional charges of three quarks combine to give protons and neutrons their familiar charges.
How many down quarks are in a neutron?
Answer: Two
Bonus fact: A neutron is made of one up quark and two down quarks.
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.
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.