This elemental atom will be in (column:) group 3, or 13, and (row:) period 4:
21-Sc or 31-Ga
Sodium, because it is in group 1, it has 1 valence electron. Like all period 3 elements, it has 3 energy levels.
Silicon. Its electron configuration is [Ne]3s23p2.
The element of potassium
Potassium -- K
1 valence electron
In common with all the other Alkali Metals, Rubidium has one valence electron.
Cesium, or Cs, has 1 valence electron.
Potassium has 19 total electrons and one electron in its 4th energy level.
N=2 To N=1 The greatest energy change comes between the lower energy levels.
Six electron shells
1 valence electrons 2 full outer shells (electron levels) 3 outer shells (electron levels)
If you are referring to the valence shell; the answer is one.
the element sodium has 1,000,000 million energy levels.
the group number shows the number of electrons in the outermost energy levels. forexample sodium (Na) have 1 electron in the outermost shell and is placed in the group 1. Elements are grouped in rows depending on their energy levels, or valence electron numbers. Columns of elements are those that are chemically similar, or react
Fr is in the 1st period. It removes an electron to get noble gas configuration. Fr+ does not have valence electrons.Francium has 1 electron in its outermost energy level. It donates its outermost electron to stabilize its electron configuration. Francium(I) has no valence electrons.
Hydrogen has only 1 electron and has only 1 energy level.
1 valence electron
In common with all the other Alkali Metals, Rubidium has one valence electron.
A cesium atom has 1 valence electron. It is an alkali metal, and all alkali metals have 1 valence electron. The electron configuration for cesium is (Rn)7s1. The single electron in the 7s sublevel is its valence electron.
Hydrogen has only one electron. Just the one. And it is a valence electron.
Cesium, or Cs, has 1 valence electron.