<span>mass of electron:9.109 times 10^-31 kg mass of proton: 1.673 times 10-27 speed of light=3.0 times 10^8 avogadro's number 6.02 times 10^32 planck's constant: 6.63 times 10^-34</span> I just searched on bing! Hope it helps!
Mass of electron:9.109 times 10^-31 kg mass of proton: 1.673 times 10-27 speed of light=3.0 times 10^8 avogadro's number 6.02 times 10^32 planck's constant: 6.63 times 10^-34 just google chem constants sheet