What Are 3 Interesting Facts About Platinum?
What Are 3 Interesting Facts About Platinum? Atomic number (number of protons in the nucleus): 78. Atomic symbol (on the periodic table of elements): Pt. Atomic weight (average mass of the atom): 195.1. Density: 12.4 ounces per cubic inch (21.45 grams per cubic cm) Phase at room temperature: solid. Why is platinum so rare? Platinum