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number of electrons in valence (last) shell
Elements in the same group have the same number of valence electrons. These are the outer-shell electrons that react with other elements.
True. Its a matter of the number of electrons in the outer shell. Elements in the same group have the same number.
Such atoms belong to a group in the periodic table of elements.
alkali metals (group 1 elements)
number of electrons in the bonding shell vary according to the element. for example group 1 in the periodic table contains elements with ony one electron in their bonding shell, similarly group 2 has elements with two electrons in its bonding shell and so on. the group number in the periodic table denotes the number of electrons in the bonding shell of each element present in that particular group
All elements in Group 7 have the same number of electrons in their outermost shell and this number corresponds to the group number.
Electron configuration - they have the same number of elements in their outer 'electron shell'. This induces them to have similar bonding properties, and so elements in the same group are chemically similar.
Valence electrons (electrons in the outer shell)
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.
4.See the Related Questions for how to determine the number of electrons in the outermost shell of all the elements!
the same number of valence electrons (which is the same number of electrons in the atom's outermost shell)
They all have the same number of valence electrons in their outer shell
number of electrons in valence (last) shell
Elements in the same group have the same number of valence electrons. These are the outer-shell electrons that react with other elements.
Groups are the number of outer shell electrons in the elements and periods are the number of outer shells in the elements. eg. group 4, period 3 is Silicon which means that it has 3 shells where the electrons are stored and in the last shell it has 4 electrons
Chemical elements that are in the same group within the periodic table have the same numbers of electrons in the outermost shell. This gives them similar reactivity.