This elemental atom will be in (column:) group 3, or 13, and (row:) period 4:
21-Sc or 31-Ga
Elements in the sodium family (Group 1A or Group 1) have 1 valence electron. This is because they have one electron in their outermost energy level.
Potassium has 19 total electrons and one electron in its 4th energy level.
Cesium, or Cs, has 1 valence electron.
Elements in group 1 (alkali metals) have 1 valence electron. This single electron is in the outermost energy level of the atom, making these elements very reactive and likely to lose this electron to achieve a stable electron configuration.
1 valence electron. It is an alkali metal and all alkali metals have one atom on their last energy level.
Astatine has multiple energy levels, but the exact number depends on the context in which you are referring to them. In an atom, astatine can have multiple electron energy levels based on its electron configuration. In a nuclear context, astatine isotopes may have different energy levels related to their nuclear structure and decay modes.
If you are referring to the valence shell; the answer is one.
Elements in the sodium family (Group 1A or Group 1) have 1 valence electron. This is because they have one electron in their outermost energy level.
Potassium has 19 total electrons and one electron in its 4th energy level.
An alkali metal has 1 valence electron. Group 1 elements, such as lithium, sodium, and potassium, all have 1 valence electron in their outermost energy level.
Cesium, or Cs, has 1 valence electron.
Potassium has one valence electron. It belongs to Group 1 of the periodic table, which means it has one electron in its outermost energy level.
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
Elements in group 1 (alkali metals) have 1 valence electron. This single electron is in the outermost energy level of the atom, making these elements very reactive and likely to lose this electron to achieve a stable electron configuration.
1 valence electron. It is an alkali metal and all alkali metals have one atom on their last energy level.
Hydrogen has only one electron. Just the one. And it is a valence electron.
The electron in the outermost shell will emit the greatest amount of energy when dropping electron levels because it has the highest energy level. Electrons in higher energy levels have more energy to release when transitioning to lower energy levels.