The element in a given vertical column (or groups) have the same number of valence electrons and hence have similar properties.
Chemical properties.
Elements are organised in terms of properties in same column. Properties are found to be periodic .
Elements in the same column have similar properties.
A group of elements.
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They have similar properties, usually.
A column in the periodic table is a vertical group of elements that share similar chemical properties due to having the same number of valence electrons. These columns are known as groups or families, and there are 18 groups in the periodic table.
Chemicals in a column, or "group" have similar chemical properties.
Elements in the same column have similar chemical properties. They are from the same family.
They have similar (more or less) chemical properties.
A column is known as a group in periodic table. There are 18 groups in the modern setting of periodic table. Elements in the same group usually share same chemical properties and striking physical characteristic trends.
They're arranged so that the elements in each column have similar properties.