Create an account
English chemist and schoolteacher who formulated a theory to describe the structure and chemical reactivity of matter in terms of Atoms
T or F: According to Dalton's atomic theory, toms are composed of protons, electrons, and neutrons
a stream os electrons produced at the negative electrode of a tube containing a gas at low pressure
Atoms of the same element are identical in most respects, but they can differ in the number of ________ in the nucleus
The _____ of an element is the weighted average of the masses of the isotopes of that element
T or F: The atomic number of an element is the sum of the protons and electrons in an atom of that element
T or F: The number of neutrons in the nucleus can be calculated by subtracting the atomic number from the mass number
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!Reload
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