Neutral Calcium (Ca): 20 protons and 20 electrons. Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s². Calcium Ion (Ca²⁺): 20 ...

All the elements in the Periodic Table are made from different atoms, and the structure of these atoms results in a gamut of phenomena from radioactive decay to nuclear power. When you purchase ...

As previously mentioned, calcium has an atomic number of 20. This means that every calcium atom has 20 protons in its nucleus. In a neutral calcium atom, the number of electrons must also be 20 to ...

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue examines how atomic structure determines reactivity. Meet Theo Gray, chemist and author, who ...