Question

select all that apply
which statements about the sixth quark are true?
□ scientists were surprised when they found evidence for the sixth quark.
□ it took several years and an international team of nearly 450 scientists to find the sixth quark.
□ scientists discovered five quarks and hypothesized that a sixth quark existed.
□ the sixth quark was hard to detect because only about one - billionth of a percent of the proton collisions performed showed its presence.
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Explanation:

Quarks are fundamental particles. The discovery of the sixth quark was a significant event. Scientists were indeed surprised upon finding evidence for it. It took years and a large - international team to discover it. Before its discovery, five quarks were known and the existence of a sixth was hypothesized. Its rarity (only showing up in a tiny fraction of proton - collisions) made it hard to detect.

Answer:

All of the above statements are true. So,

• Scientists were surprised when they found evidence for the sixth quark.
• It took several years and an international team of nearly 450 scientists to find the sixth quark.
• Scientists discovered five quarks and hypothesized that a sixth quark existed.
• The sixth quark was hard to detect because only about one - billionth of a percent of the proton collisions performed showed its presence.