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Two electrons are in the external shell of vanadium.
There are only one electron. They are called alkaline metals.
elements, or atoms, do not have valence numbers, they have valence orbitals (the outermost one) or valence electrons (all the electrons in the outermost orbital). you can look this up anywhere that shows the electron configuration, like your periodic table.
Atoms form ions to increase their stability. For example consider sodium which has a single electron in its outermost shell. If it looses this electron it will have a complete octet in its outermost shell which is way more stable than a single electron in the outermost shell. So to increase their stability in a way that is energetically feasable, atoms usually form ions.
Francium!
Valence.
Barium (56)
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
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The element carbon
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
The electron and the outermost electrons' orbital radius.
The amount of energy needed to remove the outermost electron.
The combining capacity of an element with another element is called valencyOR The number of electron gained or lost by outermost shell of an element is called its valency
The velence electron will vary for element to element and can have 1 to 8 valence electrons.
The outermost electron of copper is situated in d block. Therefor copper is a d block element.