Only 17 and 18.
The Periodic Table of the Elements contains every element known to man. On the Periodic Table, the elements are classified into periods (rows) and groups (columns). Elements are placed near elements with similar characteristics to them.
Groups in the periodic table are the vertical columns in which the elements are arranged.
Representative elements
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.
The elements located in the first column, group IA on the periodic table, are called alkali metals.
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71. The actinide series belongs to row seven as elements 89-103.
Periodic table contains elements arranged in rows and columns. It is done according to increasing atomic number.
The Periodic Table of the Elements contains every element known to man. On the Periodic Table, the elements are classified into periods (rows) and groups (columns). Elements are placed near elements with similar characteristics to them.
There are 18 groups in the Periodic Table of elements.
Representative elements
There are 18 groups in the periodic table of elements.
The vertical columns.
A chart that displays and organizes the elements in rows and columns.
A chart that displays and organizes the elements in rows and columns.
A chart that displays and organizes the elements in rows and columns.
Groups in the periodic table are the vertical columns in which the elements are arranged.
by the atomic mass of the elements.