The long form of the periodic table consists ofSeven period and eight groupsSeven periods and eighteen groupsEight periods and eighteen groupsEight periods and seven groups.

Describe how the modern periodic table is organized.

Group numbers on the periodic table help us determine ______.

Mendeleev classified elements inSix periods and seven groupsEight periods and eight groupsSeven periods and eight groupsEight periods and seven groups

The periodic table is organized into rows, known as periods, and columns, known as groups or families. Elements within the same family on the periodic table A. are alphabetically arranged. B. share a similar number of protons. C. are very different from one another. D. share similar chemical properties.

The Modern Periodic Table of Elements is arranged by