Question

An element of atomic weight 40 has 2, 8, 8, 2 as the electronic configuration. Which one of the following statements regarding this element is not correct? 1)It has 20 electrons 2)It belongs to IInd group of the periodic table 3)The formula of carbonate is M(CO3)2 4)It belongs to alkaline earth metals

Answer 1

Calcium is the answer .

Hope this will help you.

Answer 2

Answer:

option 3) is wrong

Explanation:

the element in question is calcium. calcium carbonate's formula is CaCO3