Jump to Atomic Structure - [Bohr Model of Calcium], Number of Energy Levels: 4. First Energy Level: 2. Second Energy Level: 8. Third Energy Level: 8. Fourth Energy Level: 2. read more
The atomic number of calcium (Ca) is 20.The atomic weight of Ca is 40.078 grams per mole.See the Web Links and the Related Questions to the left of. read more
Name: Calcium: Symbol: Ca: Atomic Number: 20: Atomic Mass: 40.078 atomic mass units: Number of Protons: 20: Number of Neutrons: 20: Number of Electrons: 20: Melting Point read more