Because they have the same number of valence electrons.
Chemical properties.
A group of elements.
Elements in the same column have similar chemical properties. They are from the same family.
Elements arranged in one column exhibit similar chemical properties. Elements in same column also have similar physical properties. Also elements in same column has similar electronic configuration.
They're arranged so that the elements in each column have similar properties.
Elements in the same column have similar properties.
They have similar properties, usually.
Elements with similar properties are found in the same group or column on the periodic table. This is because they have the same number of valence electrons, which influences their chemical behavior. Elements in the same group tend to react in similar ways and have comparable physical properties.
Elements in a given column have the same number of valence electrons and hence the similar properties.
They have similar (more or less) chemical properties.
Chemicals in a column, or "group" have similar chemical properties.
Elements in the same column on the periodic table, known as a group, share similar chemical properties due to having the same number of valence electrons. This results in them displaying similar reactivity patterns and forming similar types of compounds when they react with other elements.