Is the number of valence electrons the same for all elements within a group on the periodic table?
1 Answer
Dec 31, 2017
This is not always true.
Explanation:
For main group elements, the number of valence electrons is the same in every element in the same group.
[Example]
Group 1 elements have 1 valence electron in the
H
Li
Na
etc…
Group 16 elements have 6 valence electrons in
O
S
Se
…
However, some transition metals don't follow this rule.
For example, let's see the electronic structure of Group 8.
Fe
Ru
Os
The electronic sturcture of iron, ruthenium and osmium are cited from WebElements (https://www.webelements.com/).