A synonym is a word or phrase that means exactly or nearly the same as another word or phrase in the same language. Words that are synonyms are said to be synonymous, and the state of being a synonym is called synonymy. The word comes from Ancient Greek syn (ÏÏÎ½) (with) and onoma (á½Î½Î¿Î¼Î±) (name).
One magnesium atom and two chlorine atoms react to form one unit of magnesium chloride. This is because the magnesium atom has an oxidation number of -2 and each chlorine atom â¦ has an oxidation number of +1. 3 people found this useful.Answered.In Elements and Compounds.he formula unit for magnesium hydroxide is Mg(OH)2. This shows that in each formula unit there are two oxygen atoms, two hydrogen atoms, and one magnesium atom for a total of â¦ five atoms altogether. 5 people found this useful.
Your starting point for finding the electron configuration of the magnesiu mcation, #Mg^(2+)#, will be the electron configuration of the neutral magnesium atom, #Mg#. You know that magnesium is located in period 3, group 2 of the periodic table, and that it has an atomic number equal to #12#. This means that a neutral magnesium atom will have a total of #12# protons in its nucleus and #12# electrons surrounding its nucleus. Its electron configuration would look like this. #Mg:  1s^2 2s^2 2p^2 3s^2#. Now, when the magnesium cation is formed, two electrons, hence the #2+# charge of the cation, are lost by the mgnesium atom. These electrons, which are called valence electrons, come from magnesium's outermost energy level.