At room temperature, all of the elements in group 18 (the noble gases) Are very reactive.
Are not chemically reactive.
Have the same number of protons.
Have few outer energy level electrons.

Timed ! in which of these statements are protons, electrons, and neutrons correctly compared? quarks are present in protons and neutrons but not in electrons. quarks are present in protons, neutrons, and electrons. quarks are present in neutrons and electrons but not in protons. quarks are present in protons and electrons but not in neutrons.