Online College Courses for Credit

Atomic Structure

Atomic Structure


Students will be able to identify all subatomic particles in terms of location, size, and charge.

Here are the basics about atomic structure.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

310 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


Basic Atomic Structures

Source: Langhans and various educators

Review of Atoms and Preview of Periodic Table

Good review

Source: Langhans and various educators

Applications and Implications: These are the “S” in WSQ. You must have them under your video notes completed by the due date on the Unit Plan.

1. 1. The atomic number tells the number of positively charged ________ in the nucleus of an atom. The atom is __________ because this is also the number of __________ charged __________ in the atom.

2. The mass number tells the total number of________ and _________ in the nucleus of an atom. These particles collectively are called ___________ since both are located in the nucleus.

Use the diagram to complete the next 4 questions:

3. Draw five protons in the nucleus of the atom. Label them with their charge.
4. Draw six neutrons in the nucleus of the atom. 
5. Draw two electrons in the first energy level and label them with their charge.
6. Draw three electrons in the second energy level and label them with their charge.

Source:, Langhans and various educators

HOT Question

Source: Inspired by C. Kirch