Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).
The periodic table consists of elements arranged in a vertical (groups) and horizontal (periods) manner.
However, elements on the same group are known to have the same chemical properties because they possess the same number of valence electrons, hence, react chemically similar.
These elements have the same chemical properties because they contain the same number of valence electrons.
Example of elements with those similarities are chlorine, fluorine, iodine etc.
Learn more about periodic table at: https://brainly.com/question/11155928
#SPJ1