Question

What is the symbol for an element that is an alkaline earth metal?

Answer 1

Hint: We have to know that, before the nineteenth century, substances that were nonmetallic, insoluble in water, and unaltered by fire were known as earth. Those, earth, like lime (calcium oxide) that took after the alkalis (soft drink debris and potash) were assigned basic earth.

Complete answer:
We have to know that, the basic earth metal, any of the six synthetic components that involve group $2$ ( $IIa$ ) of the intermittent table. The components are beryllium ( $Be$ ), magnesium ( $Mg$ ), calcium ( $Ca$ ), strontium ( $Sr$ ), barium ( $Ba$ ), and radium ( $Ra$ ).
Basic earth was along these lines recognized from the alkalies and from other earth, like alumina and the uncommon earth. By the mid $1800$ ’s, it turned out to be certain that the earth, some time ago viewed as components, were truth be told of oxides, mixtures of a metal and oxygen. The metals whose oxides make up the soluble earth at that point came to be known as the basic earth metals and have been ordered in Group $2$ ($IIa$ ) of the intermittent table since the time Russian physicist Dmitry Mendeleyev proposed his first table in $1869$ .
Similarly as with the soluble base metals of Group $1$ ( $Ia$ ), the particles of the antacid earth metals effectively lose electrons to become positive particles (cations). The majority of their regular mixtures are subsequently ionic salts in which the metal happens as the cation ${M^{2 + }}$ , where M addresses any group $2$ particle. The salts are dull except if they incorporate a hued anion (negative particle).

Note:
We have to know that, the recipes of regular basic earth compounds, like calcium chloride ( $CaC{l_2}$ ) and calcium oxide ( $CaO$ ), might be diverged from the relating mixtures of the salt metals (which contain ${M^ + }$ particles), sodium chloride ( $NaCl$ ), and sodium monoxide ( $N{a_2}O$ ).