Cr2(CO3)3 is Chromium (III) Carbonate or Chromic Carbonate.
It is composed of Chromium, Carbon, and Oxygen. Chromium has 2 atoms, Carbon has 3 atoms, and Oxygen has 9 atoms.
This compound is composed of 36.6% Chromium, 12.7% Carbon, and 50.7% Oxygen.
Bohr changed the model of the atom by proposing that electrons travelled in circular orbits with specific energy levels.
D= mass/volume so it's 100/68 which equals 1.47cm3
