Create an account
True or False: More than three-fourths of the elements in the periodic table are nonmetals.
False- most are metals
True or False: Group 3A elements are the alkaline earth metals
False- group 2A elements are the alkaline earth metals
True or False: Group 8A elements are very unreactive elements known as transition metals
False- group 8A elements are the noble gases
True or False: Metalloids have properties of both metals and inner transition metals.
False- have properties of metals and non-metals
The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to
Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing
Mendeleev did not always list elements in his periodic table in order of increasing atomic mass because he grouped together elements with similar
In developing his periodic table, Mendeleev listed on cards each element's name, atomic mass, and
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