They are called groups. The classic form indicates the 18 groups as 1A, 2A, 3B, 4B, 5B, 6B, 7B, three columns as 8B, 1B, 2B, 3A, 4A, 5A, 6A, 7A, and 8A (or 0). The IUPAC renumbered the groups as simply 1 to 18 in 1990.
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chemistry
they represent elements. the elements in a given column (or group) have the same number of valence electrons and hence similar properties.
A vertical column is called a 'group.' A horizontal row is called a 'period,' thus the periodic table.
hydrogen
groups or family:))
sorry I don't know
chemistry
Elements in a given column have the same number of valence electrons and hence the similar properties.
they represent elements. the elements in a given column (or group) have the same number of valence electrons and hence similar properties.
This is probably a reference to the periodic table of the elements, which has columns. All the elements in a given column have the same configuration of valance electrons. There is a column of noble gases, a column of halogens, etc.
Representative elements
the elements in a given column have the same number of electrons in their outermost shell and hence have similar chemical properties.
groups
The elements that are listed in vertical columns all share specific aspects. These aspects include having the same number of valence electrons and having similar chemical properties.
A group in the periodic table is a column of elements that share similar chemical properties due to having the same number of electrons in their outer energy level. Groups are vertical columns and are numbered from 1 to 18.
Elements in a given group have the same number of valence electrons and hence they have similar properties.
A group of elements.