Anda tahu, ahli kimia memiliki cara menghitung yang rumit: alih-alih mengatakan "satu, dua, tiga, empat, lima proton", mereka berkata, "hidrogen, helium, litium, berilium, boron." Asli: You see, the chemists have a complicated way of counting: instead of saying "one, two, three, four, five protons", they say, "hydrogen, helium, lithium, beryllium, boron."

— Richard P. Feynman