The s-block in the periodic table of elements occupies the alkali metals and alkaline earth metals, also known as groups 1 and 2. Helium is also part of the s block. The principal quantum number “n” fills the s orbital. There is a maximum of two electrons that can occupy the s orbital.
- Group 2 Elements: The Alkaline Earth Metals
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- The elements in the group include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).