👉 Carbonium is a chemical element with symbol C and atomic number 12. It is one of the two elements that make up calcium, the most abundant mineral in Earth's crust. Carbonium has a relatively low atomic mass (average atomic mass of carbon is approximately 12.01), making it one of the lighter elements in the periodic table. Carbonium is also known as argon, but it is not usually considered to be an element with a single atomic number. In chemistry
