Calcium is found on the left of the periodic table, surrounded by other metals ... Looking for more resources for your chemistry lessons? In this short video, scientist Mark Miodownik visits ...

Across the hall, a rebuilt but venerable cyclotron was flinging calcium atoms against a bit ... grouping them by mass and other attributes in his periodic table. Later scientists traced Mendeleyev ...

After the third energy level has 8 electrons, the next electron goes into the fourth level. 4th Period: Potassium and Calcium—Electrons go into the fourth energy level. A small piece of sodium metal ...