Question

the electron dot diagrams of calcium and magnesium are shown. ca : calcium mg : magnesium both elements have the same number of valence electrons. in what other way are these elements the same? question: both elements have the same atomic mass. both elements have the same atomic number. both elements are in the same group on the periodic table. both elements are in the same period on the periodic table.

Explanation:

Calcium (Ca) and magnesium (Mg) are both in Group 2 of the periodic table. Elements in the same group have the same number of valence electrons and similar chemical properties due to their identical outer - electron configurations.

Answer:

Both elements are in the same group on the periodic table.