Helium which has a chemical formula of He is considered as
a noble gas while Nickel which has a chemical formula of Ni is considered as
metallic. Although both have different phases but they are both classified under
the general category of “Elements”.
answer:
<span>elements</span>
Answer:
example of carbonate containing oxygen :
( calcium carbonate having 3 atoms of oxygen )
example of oxide containing oxygen :
( carbon dioxide having 2 atoms of oxygen )
B is gas
The chemical element krypton is classed as a noble gas and a nonmetal.
Love you
