* Denser: Alkaline earth metals are denser than alkali metals because they have a smaller atomic radius and a greater number of protons in their nucleus, leading to a stronger attraction between the nucleus and electrons.
* Harder: The stronger metallic bonding in alkaline earth metals makes them harder than alkali metals.
* Higher Melting Points: The stronger metallic bonding also contributes to higher melting points for alkaline earth metals.
* Slightly Less Active: Alkaline earth metals have a lower reactivity than alkali metals. This is because they have two valence electrons, which are less easily removed than the single valence electron of alkali metals.
Examples of alkaline earth metals include:
* Beryllium (Be)
* Magnesium (Mg)
* Calcium (Ca)
* Strontium (Sr)
* Barium (Ba)
* Radium (Ra)
Let me know if you'd like to know more about any of these properties!
