They are in common because the number of valence electrons stay the same
They have the same amount of valance electrons.
Boron is located in group 3A. It is group 13 in modern notation. This set of elements have three valence electrons.Boron is in the 13th group in the periodic table. Elements in this group has 3 electrons in the outermost energy level. That means they have 3 valence electrons.
amount of electrons in their outermost shell that their shell can hold in relative of one to maximum amount their outer shell can handle in a stable element.
they all have the same amount of valence electrons. Except with group 18 they all are the same except for Helium which has 2 valence electrons.
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What they have in common is that the ones of the same family is that they all have a close amount of protons.
All are elementary particles, with the same mass, negative charged (-1).
Elements in the same family (or group) have the number of valence electrons in common. Ex: Family 16 - 6 valence electrons.properties
number of valence electrons
all have 8 electrons in the valence shell
they all have a total of 5 valence electrons
have the same number of valence electrons, need the same number of electrons to fill their valence shells