Which element does not nomally form chemical bonds?
a. bromine (br)
b. magnesium (mg)
c. xenon (xe)
d. nitrogen (n)r

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

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.

Which accurately compares concave and convex lenses?