The outer shell of an atom is most stable or non reactive with 8 electrons. 1 or 2 valence electrons would be reactive. It also would depend if it's bonded with another element.
Type your answer here... are valence electrons reactive or non reactive
Beryllium has two valence electrons.
O - Oxygen has 6 valence electrons.
Yes, calcium has valence electrons - two, in fact (it is a divalent chemical element).
Only for hydrogen and helium are these two numbers the same. All other elements have at least two non-valence electrons, and the total number of electrons must be equal to the number of protons. Therefore, in all elements except hydrogen and helium, the number of valence electrons is less than the number of protons.
Group 2 metals have 2 valence electrons. In fact, the number of valence electrons of elements can be deduced from the group number (e.g. group VII elements have 7 valence electrons).
There are two non-valence electrons in a neturol boron atom. The electronic configuration of neutral boron is 1s2, 2s2 2p1. The three electrons in the 2d shell are the valence electrons; the non--valence electrons are in the 1s orbital.
All noble gasses have 8 valence electrons, it is what makes them "stable" and therefore are non reactive.
Two valence electrons.
Beryllium has two valence electrons.
Helium has two valence electrons. It is the only noble gas not to have eight valence electrons. Helium has the electronic configuration 1s2.The Noble gases have eight valence electrons in their outer shell.
In a reaction u need two valence electrons to gain or share two valence electrons.
Neptunium has two valence electrons.
Beryllium has two valence electrons.
Zinc has two valence electrons.
Calcium has two valence electrons.
Beryllium has two valence electrons.
Radium has two valence electrons.