1
Noble gasses are not reactive. :)
A lanthanide element is any element that resides in the Lanthanide series on the Periodic Table. The Lanthanide series is just under the Actinide series on the Periodic Table and is usually seperated from the main part of the Periodic Table. All of the Lanthanide elements are radioactive.
flash foward
Only Fluorine belongs in the halogen family.
what is the literal meaning of the word tactis
The correct answer is: That each element has a different number of protons....
Chris Ellis
They are silvery metals that conduct electricity
they are harder than alkali metals
i have
Argon (Ar) is one of them
Sewer system