Helium has two valence electrons
there are 8 electrons in the valence shell of neon
there are 8 electrons in the valence shell of neon
Helium has 2 valence electrons.
Hydrogen and helium
Valance electrons. When you get to core electrons the ionization energy is extremely high and found under plasma conditions.
there are 8 electrons in the valence shell of neon
there are 8 electrons in the valence shell of neon
You should understand that while neutral atoms have the same number of protons and electrons, they do not usually have the same number of protons and valance electrons, because except for hydrogen and helium, atoms also have electrons in the inner shells, which are not valance electrons. Therefore, there is no atom which has 7 protons and 7 valance electrons, although there is an element that has 7 protons, and there are several elements that have 7 valence electrons.
Valance electrons.
The groups, or families of elements have the same number of valance electrons and this information can be found at the top of the periodic table. For instance; 1A represents the alkali metals and they all have a valance number of 1. Then go from the left to the right and look at the top of the table. 8A represents the farthest left family of elements, from top to bottom, the Nobel gasses. They have a full valance shell of 8 electrons.
2 electrons in the only shell helium has.
Helium has 2 valence electrons.
Hydrogen and helium
Valance electrons. When you get to core electrons the ionization energy is extremely high and found under plasma conditions.
the number of electrons found in the third shell of an helium atom are nill because its atomic number is 2
In normal Helium(He) atom there are 2 electrons, 2protons and 2 neutrons.
Hydrogen and helium