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Alkaline Earth Metals Facts
For the best answers, search on this site shorturl.im/awsCb Li is less dense than water. Normally lithium is weaker than sodium and should therefore be kicked out by sodium metal. But there are some compounds of Li that Na can't displace because of Li+ being so small, Na just can't get to it. Be belongs to the family that all have 2+ oxidation state, but can have +1 under some conditions. Cesium's valence electron is so loosely bound that simply shining a light on the metal will cause that electron to fly away, somewhat photovoltaic all by itself. Radium chloride will glow in the dark, of course. This was made use of in glow-in-the-dark watches. Workers used thin hair brushes to apply the radium paint, but to keep the brush neat and thin, some would wet the tip in their mouth and turn-squeeze the tip between the fingers. After a few years of that practice, we learned of the cancer causing power of radium. The derivations of the names are interesting. Lithos - stone. Potassium - potash. Sodium - soda. Rubidium - rubidos - red. Cesium - sky blue. Barium - barys - heavy. Beryllium was called glucinium because of its sweet taste, but later was changed to more appropriately where it can be found, in beryls. The difference in strength between sodium and potassium is enough to allow the heart to keep beating.
