S Block Elements, Chemistry, Short Notes.
to flames: Li (crimson), Na (yellow), K (violet), Rb (red), Cs (blue). Alkaline Earth Metals (Be, Mg, Ca, Sr, Ba, Ra) ➭ Less reactive than alkali metals: React with water slowly, forming less soluble hydroxides. ➭ Higher ionization energies: Need more energy to remove two valence electrons. ➭