Inert gases
The outer electron configuration for all group 1 elements is ns1, where n represents the energy level of the outermost electron. This means that group 1 elements have one electron in their outermost shell.
name the group of elements that have only one electron in their outermost energy level
Group 1 elements are metallic in nature. They have 1 electron in their outermost octet.
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.
In the periodic table, group indicates the number of valence electrons in the outermost shell. E.g. Group I- the elements in that group have one valence electron in the outermost shell.
Group one elements are generally more reactive than group two elements. This is because group one elements have one electron in their outermost shell, making them more willing to react and form compounds in order to achieve a stable electron configuration. Group two elements have two electrons in their outermost shell, which makes them less reactive than group one elements.
Elements in Group 2 of the periodic table will have an electron configuration that ends in s2. This group includes elements such as beryllium, magnesium, and calcium. They have two electrons in their outermost s sublevel.
Because group 1 has 1 electron in it's outer most shell and the have to fill the energy level, so they gave there electron and form positive ion (cation). And group 17 has 7 electrons in it's outer most shell and they need to complete their shell so the gain electron and form negative ion (anion).
All group 1 elements have a +1 charge because they readily lose their outermost electron to achieve a full outer shell and attain a stable electron configuration.
The Elements have a different Total Number of Electrons, but the same number of Valence Electrons.
They don't. Of the main group, or representative elements, group 1 elements are the only ones whose atoms have only 1 electron in their outermost energy levels.
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.