Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account


means not able to be divided; smallest particle an element can be divided into and still be the same substance


positively charged center that includes protons and neutrons; very, very dense

electron clouds

areas inside of an atom where electrons are likely to be found; the exact path cannot be predicted because they do not travel in exact paths


positive charge; mass is very small at 1.7x10-24
or 1 atomic mass unit, or amu
*INSIDE the nucleus


neutral charge; a little larger than a proton but so slight that it's still considered to be 1 amu
*INSIDE the nucleus


negatively charged
*mass is so small that they are not part of the total mass of the atom


atoms w/ the same # of protons but different # of neutrons that share the same characteristics as the original element

# of electrons in level 1

2 electrons

# of electrons in level 2

8 electrons

# of electrons in level 3

18 electrons

#of electrons in level 4

32 electrons

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording