Home Module Atomic Number

Atomic Number


An element’s atomic number is the number of protons present in the nucleus of that atom. When you look at an element in the periodic table, the number located in the upper left corner of the square is the atomic number of that element.

Learning objectives

After completing this module, you will be able to:
 - Define atomic number of an element.
 - Locate an element's atomic number in the periodic table.
 - Calculate the number of electrons present in an atom or ion using its atomic number.

Keywords Periodic Table , Atom , Ion
Controller Required Yes
Languages English - US , English - UK , 中文 , عربي , Français
Domain K-12
Topic Code MS200295
Devices Google Cardboard , Google Daydream , Samsung Gear VR , Oculus Go , Pico , EduPro