its in column two on the periodic table, so therefor it has two valence electrons .
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Calcium is in group 2 of the Periodic Table, so it has 2 valence electrons. Group number corresponds to the number of valence electrons in an element.
Calcium carbonate has 16 valence electrons. Calcium contributes 2 valence electrons, while each oxygen atom contributes 6 valence electrons.
Arsenic: 5 valence electrons Iodine: 7 valence electrons Calcium: 2 valence electrons Tin: 4 valence electrons Sulfur: 6 valence electrons
Boron has 3 valence electrons, gold has 1 valence electron, krypton has 8 valence electrons, and calcium has 2 valence electrons. Valence electrons are the electrons in the outermost energy level of an atom.
Type your answer here... The number of valence electrons in calcium is 20, because it's almost the same thing as it's atomic number.
Calcium would need to lose 2 electrons to have 8 valence electrons. This is because calcium has 2 valence electrons in its outer shell, and by losing these 2 electrons, it can achieve a stable octet configuration like the noble gas argon.