Beryllium has one outer electron shell with two electrons.
Two energy shells. Made up as 1s2, 2s2 Shells 1 & 2 each have only 's' orbital and each orbital has only two electrons in it. The outer shell '2' is more energetic. The electrons are paired and spin in opposite directions to each other.
Electronic configuration of beryllium: 1s2.2s2.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.
There are many elements which have no unpaired electrons in their outer shells. The Noble gasses all have closed shells of valence electrons. The alkali earth metals (Beryllium, Magnesium, Calcium etc) also have no unpaired electrons, although their outer shell is not entirely full.
An element with 2 energy levels and 2 electrons in the outer layer is beryllium (Be). Beryllium has an atomic number of 4, with 2 electrons in the first energy level and 2 electrons in the second energy level, making it a neutral atom.
Beryllium has two electron shells.
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Beryllium has one valence shell containing two electrons.
Two energy shells. Made up as 1s2, 2s2 Shells 1 & 2 each have only 's' orbital and each orbital has only two electrons in it. The outer shell '2' is more energetic. The electrons are paired and spin in opposite directions to each other.
Beryllium has 2 electron shells.
Only two electron shells.
Beryllium has two electron shells.
Only two electron shells.
Beryllium will lose 2 electrons to satisfy the octet rule (to fill its outer shell).
Electronic configuration of beryllium: 1s2.2s2.
Beryllium and magnesium have two electrons in their outermost energy level, as do all Group 2 elements.
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