The number of electrons in the outter shell
There are 18 groups in the periodic table of elements.
Groups are arranged as columns in the periodic table; the contained elements have similar properties.
Scientists call columns on the periodic table "groups" or "families." These columns contain elements with similar chemical properties due to their shared number of valence electrons.
They indicate groups of elements which often (but not always) share common properties. (cf. http://en.wikipedia.org/wiki/Periodic_table#Groups)One of the common characteristics in a group is that they share the same number of electrons on the outer shell.
The vertical columns are groups or families. There are 18 such families.
There are 18 groups in the periodic table of elements.
There are 18 groups in the Periodic Table of elements.
The columns on a periodic table are called "groups" or "families." Groupings are based on the number of valence electrons elements within the same group have in common, which influences their chemical properties.
Groups in the periodic table are vertical columns that contain elements with similar chemical properties. Elements in the same group have the same number of valence electrons, which determines their reactivity and chemical behavior. There are 18 groups in the periodic table.
Groups are arranged as columns in the periodic table; the contained elements have similar properties.
It groups elements with similar properties in vertical columns
The columns are called groups (or, sometimes, families). The rows are called periods.
Is the Periodic Table. The columns down are the GROUPS The lines across are the PERIODS.
Colunms are named 'Groups'. Rows are named 'Periods'.
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.
Scientists call columns on the periodic table "groups" or "families." These columns contain elements with similar chemical properties due to their shared number of valence electrons.
They indicate groups of elements which often (but not always) share common properties. (cf. http://en.wikipedia.org/wiki/Periodic_table#Groups)One of the common characteristics in a group is that they share the same number of electrons on the outer shell.