A chemical family consists of elements on the periodic table that belong to a group. Elements in a chemical family share similar chemical characteristics or physical properties. For example, depending on their location from left to right on the periodic table, elements in each chemical family also exhibit certain trends in things, such as atomic radii or sizes.Continue Reading
On the periodic table, one can find a group or family by looking down the vertical columns. The group numbers from left to right at the top of the periodic table, which range from 1 through 18, denote the different groups or chemical families. For example, the noble gases are in Group 18. This is a chemical family of elements that share many properties, such as these elements have eight valence electrons and are non-reactive. Some noble gases are argon, helium and neon.
Similarly, there are other different chemical families. The elements in Group 1 are the alkali metals. These elements include sodium and potassium, which also have one valence electron. While Group 2 are the alkaline earth metals like magnesium and calcium, the elements in Group 17 are the halogen gases and include chlorine and fluorine.
Some other examples of chemical families are the transition metal groups and the nitrogen group. The transition elements are the 38 elements belonging to Groups 3 through 12 of the periodic table. The nitrogen group is Group 15.Learn more about Chemistry
The periodic table was invented by chemist Dmitri Mendeleev to organize and compare elements and understand their relations with each other. Mendeleev created the periodic table between 1868 and 1870 while writing his book titled "The Principles of Chemistry." Initially, Mendeleev created the chart for his personal benefit, but others quickly discovered its value, leading to its immediate acceptance and use by fellow chemists upon publication.Full Answer >
The periodic table's name comes from the fact that it arranges the elements into repeating sets, otherwise known as "periods." These periods are defined by the covalence of an element, the number of electrons it has in its outermost shell and by other elemental attributes. This arrangement places elements with similar chemical properties close to one another.Full Answer >
The periodic table is useful because it identifies and arranges all known elements in an informative manner. Elements are arranged into periods and families. The elements in each family or period may have similar or dissimilar physical and chemical properties.Full Answer >
The periodic table of elements is a chemistry reference that lists elements by increasing atomic number, which typically correlates to their atomic masses. The atomic number increases from left to right as well as from top to bottom. Each of the rows on the table is a period.Full Answer >