That’s the correct way to say it.
everything else has ium in it. Potassium, titanium etc
Hydrogen, Boron, Carbon, Nitrogen, Oxygen, Flourine, Neon, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Iron, Nickel, Copper, Zinc, Arsenic, Krypton, Molybdenum, Silver, Tin, Antimony, Iodine, Xenon, Tungsten, Platinum, Gold, Mercury, Lead, Bismuth, and Radon would each like to have words with you.