How many valence electrons are in an atom of magnesium?

How many valence electrons are in an atom of magnesium?

Answer:

Magnesium has atomic number 12. Its electronic configuration is 2,8,2. Thus, it has 2 valence electrons. It loses its two electrons to get a stable or octet configuration. The number of valence electrons in an element can be identified by referring to the group it belongs to.

How many electrons are in a neutral atom of lithium?

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