The Periodic Table is arranged by atomic number, but the focus is also on its arrangement by the electron configuration. The columns, called Groups, are all the elements that have the same number of electrons in their valence shell. If we look at just Group 1, which is all the elements down the left column, each of those elements has a single electron in its outer most electron shell. They will all act in a chemically similar way because of this electron configuration. And that's the reason we arrange the table the way we do. Additionally, that is the power of the periodic table; it is a tool of both explanation and prediction.
a family is a column of elements a period is a row of elements
they are all in the same group (column) in the Periodic Table
The elements in a column on the periodic table form a group (or family) because they have similar physical and chemical properties.
A group is a verticle column of elements.
Elements that have similar chemical properties occupy the same group on the Periodic Table.
They have the same Valency
Elements in a given column have the same number of valence electrons and hence the similar properties.
The elements in same column have equal number of valence electrons. They have similar chemical properties.
Chemicals in a column, or "group" have similar chemical 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.
Elements in same column have equal number of valence electrons. so they possess similar chemical properties.
they all have the same electrons.
The noble gases, column 18 in the most common modern periodic table.
Representative elements
a family is a column of elements a period is a row of elements
they are all in the same group (column) in the Periodic Table
All elements within a column are called a group.