The periodic table is an organized, methodical way of understanding inter-relationships between different elements; a group on the periodic table is a column of elements.
There are a total of 18 groups on the periodic table. In the American periodic table, groups are labeled numerically, whereas in Europe, they are labeled by using Roman numerals.
Each group, or column, on the periodic table contain elements that have the same number of electrons in their outer most electron shell.
Elements are grouped together based on the number of electrons in their outer most electron shell because the number of electrons in the outer shell determines how that element will react with other elements. Therefore, groups of elements "behave" similarity, or are said to have similar chemical properties.
Main Group Elements
Groups are categorized based on their similarity with other groups. The main group elements consist of groups 1 and 2, and 13 through 18. Main group elements visually make up the left and right sides of the periodic table. Main group elements consist of the most abundantly found elements on Earth, including all non-metal elements (like hydrogen and helium) and some transitional metals.
Groups 3 through 11 are the transitional elements, which are all metals.
Definition of Representative Element
The Periodic Table of Elements as it is known today was developed by Russian chemist Dmitri Mendeleev and first presented in the...
Why Is Hydrogen Placed in Group One of the Periodic Table?
The periodic table is the product of nineteenth century chemists Dmitri Mendeleev, Lothar Meyer, and John Newlands. Elements are placed in rows...
Characteristics of Group 2 in the Periodic Table
Group 2 elements are those that appear in the second column of the periodic table. The group 2 elements are beryllium, magnesium,...
What Elements Are Metals, Nonmetals & Metalloids?
The periodic table of elements, one of the first things you are introduced to in chemistry in school, is an organized chart...
Common Traits of the Elements in Group 16
The elements in group 16 of the periodic table of elements are oxygen, sulfur, selenium, tellurium and polonium. Group 16 is also...