Question

1. describe the basic organizational feature of the periodic table of the elements. science notebook - matter - properties and changes 35

Explanation:

The periodic table organizes elements by atomic number. Elements are arranged in periods (rows) and groups (columns). Periods indicate the number of electron - shells an atom has, and groups have similar chemical properties due to the same number of valence electrons.

Answer:

Elements are arranged by atomic number in periods and groups, with periods related to electron - shell number and groups having similar chemical properties based on valence electrons.