Elements in a vertical group (Group 1, Group 2, etc.) of the periodic share in common the same number of valence electrons. The valence electrons are the electrons in the outer shell of an atom, and their number has a lot to do with their chemistry.
There are many things but mainly they are
-hardness (metal or nonmetal)
-reactivity
-their charge
well the horizontal rows all have the same number of valence electrons, so the vertical columns have the same number of electron shells or rings.
they all have the same number core of electrons.
They are all in a group or family
A group is a column in the periodic table of elements.
a family is a column of elements a period is a row of elements
The elements in a column on the periodic table form a group (or family) because they have similar physical and chemical properties.
A column of elements in the periodic table is called a group or
they are all in the same group (column) in the Periodic Table
They have the same Valency
The noble gases, column 18 in the most common modern periodic table.
Elements in a given column have the same number of valence electrons and hence the similar properties.
All of the elements in column 18 of the periodic table are noble gases. This means their outer electron shells are completely full and in most cases are inert.
Chemicals in a column, or "group" have similar chemical properties.
they all have the same electrons.
A group is a column in the periodic table of elements.
Representative elements
a family is a column of elements a period is a row of elements
The elements in a column on the periodic table form a group (or family) because they have similar physical and chemical properties.
groups
A column of elements in the periodic table is called a group or