1. Choose the statement that does not accurately describe observations

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

The radius of an atom is closest in size to a