What is Sodium? - Chemical Elements - Quatr.us
Welcome to Quatr.us Study Guides!

What is Sodium?

Sodium atom
Diagram of a sodium atom

Sodium is an atom that has 11 protons and 12 neutrons in its nucleus and 11 electrons circling around its nucleus. Like other light atoms such as carbon, sodium forms inside of stars that are beginning to run out of fuel, and it scatters all over space when that star explodes in a supernova.

Sodium
Sodium is soft, and you can cut it with a knife.

Because it has only one electron in its outer ring, sodium joins up easily with other atoms to make molecules. You never find it by itself in nature. Sodium joins especially easily with chlorine, because sodium needs to lose an electron to be stable, and chlorine needs to gain an electron to be stable. So once sodium and chlorine join together, it is hard to break them apart. This combination of sodium and chlorine is salt.

There's a lot of sodium on Earth. Most of the sodium on Earth is mixed with chlorine to make salt, and it is dissolved in water in our oceans.

Learn by doing - Sodium
More about salt
Salt in human history

Bibliography and further reading about atoms:

Molecules
Chemistry
Quatr.us home


LIMITED TIME OFFER FOR TEACHERS: Using this article with your class? Show us your class page where you're using this article, and we'll send you a free subscription so all your students can use Quatr.us Study Guides with no distractions! (Not a teacher? Paid subscriptions are also available for just $16/year!)
Please help other teachers and students find us: link to this page from your class page.
Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram or Twitter, or buy her book, Vandals to Visigoths.
Cite this page
  • Author: K.E. Carr
  • Title:
  • Site Name: Quatr.us Study Guides
  • Publisher: Quatr.us
  • Date Published:
Proud of your class page, homework page, or resource page? Send it in and win a Quatr.us "Great Page!" award!
Sign up for more free articles and special offers in Quatr.us' weekly newsletter:
We will never share your e-mail address unless you allow us to do so. View our privacy policy. Easy unsubscribe links are provided in every email.
Comment on This Article

Does your class page honor diversity, celebrate feminism, and support people of color, LBGTQ people, and people with disabilities? Let us know, and we'll send you a Diversity Banner you can proudly display!
Looking for more?
Quatr.us is loading comments...
(Comments will appear after moderation, if they are kind and helpful. Feel free to ask questions, and we'll try to answer them.)
Cite this page
  • Carr, K.E. . Quatr.us Study Guides, . Web. 27 March, 2017
ADVERTISEMENT