Respuesta :
The correct answer is Group 2.
Group 2 elements form 2+ ions, and CO3 is a 2- ion
With the exception of beryllium, the Group 2 elements are common metals: (a) Glossy solids that are good heat and electricity conductors and relatively soft but harder than group 1 metals at ambient temperature and pressure. (b) A somewhat high melting point.
What is group 2 elements called?
The alkaline earth metals are called after the alkaline earth, which were once known by their oxides' names, beryllia, magnesia, lime, strontia, and baryta. These oxides are straightforward to combine with water (alkaline).
Beryllium, magnesium, calcium, strontium, barium, and radium are among the group 2 elements..These substances are known as "alkaline earth metals" for two reasons: first, their oxides are extremely heat-stable and second, they persist in the earth's crust.
Alkaline earth metals make up Group 2 of the periodic table's elements. The main difference between alkaline and alkali metals is that alkali metals have one valence electron, whereas alkaline earth metals have two.
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