3
There are 2 valence electrons in cobalt.
the outer shell of cobalt contains 9 electrons.
5 valence electrons.
Group 16 (VIB or VIA) elements have six valence electrons.
A bromine anion has 8 valence electrons. This is because bromine, with 7 valence electrons, gains one extra electron when it forms an anion to achieve a full octet and become stable.
noble gases all contain 8 valence electrons because they are in column 8A on the periodic chart
The neutral atom of cobalt has 27 electrons. The number can vary up or down depending on the chemistry of the sample of cobalt. A link is provided to the Wikipedia article on the element cobalt.
Magnesium and the rest of the alkaline earth metals have two valence electrons.
it contain 7 or 8
A bromine anion (Br-) contains 8 valence electrons. Bromine is in group 7A of the periodic table and has 7 valence electrons. When it gains an extra electron to form an anion, it now has a total of 8 valence electrons.
Indium has 3 valence electrons.
A neutral Si atom has 3 valence electrons, which reside in the 3rd energy level valence shell. Therefore, there are 3 valence orbitals in a neutral Si atom.