There are 2 electrons in valence shell of calcium.
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Calcium has 2 electrons in its outer valence shell. It belongs to Group 2 of the Periodic Table, so it has 2 valence electrons.
The outer shell is called the valence shell
Calcium has 2 outer shells. It has 2 electrons in its first shell and 8 electrons in its second shell.
The outer shell of an atom is called the valence shell. It contains the valence electrons, which are involved in forming chemical bonds with other atoms.
The electrons in the outermost shell is called as valence electron. These electrons are free and they are involved in bonding reactions.
There are six electrons in the outer valence shell of a sulfur atom. Sulfur is in group 16 of the periodic table, so it has six valence electrons.