Element Beryllium, Be, Alkaline Earth Metal. Occupies the same position among the alkaline earth metals as lithium does among the alkali metals. Its combining weight is the smallest, and its similarity to the other elements of the group is least. Its properties exhibit a distinct tendency towards the next group, that of the earth metals. The combining weight of beryllium amounts to 9. Besides the typical divalent ion Be. Beryllion forms various salts, of which the chloride, Be. And the sulphate, Be.

Element Magnesium, Be, Alkaline Earth Metal. Magnesium bears the same relation to calcium as sodium does to potassium. This relation finds expression not only in the values of the combining weights, but also in the similarities to the other members of the group. This is particularly well seen in the fact that magnesium. Is now manufactured in very large amount by electrolysis, and is used for various purposes. It is a white, rather tough metal, which keeps fairly well in the air; it is scarcely attac.

Element Sodium Na, Alkali Metal. The chemical relations of sodium. Are very similar to those of potassium, so that for chemical purposes the one metal can in most cases replace the other. This holds good especially for those reactions in which the ions come into account. The reason of this is that natrion also represents a far more stable state than metallic sodium. Would die out by reason of the readily occurring lack of these. Cases of this have occurred, especially in former geological periods, and ha.

Element Hydrogen, H, Non Metal. All combustible substances are compounds. The phlogiston theory remained unrefuted for about fif.