Which statement explains how the periodic table is arranged?

A.
The periodic table is arranged by number of neutrons found within the most common isotopes.

B.
The periodic table is arranged by decreasing atomic mass.

C.
The periodic table is arranged by the radioactivity levels in unstable nuclei of elements.

D.
The periodic table is arranged by the outermost electrons of the elements.

Question

Which statement explains how the periodic table is arranged?	
 
 A.
The periodic table is arranged by number of neutrons found within the most common isotopes.
 
 B.
The periodic table is arranged by decreasing atomic mass.
 
 C.
The periodic table is arranged by the radioactivity levels in unstable nuclei of elements.
 
 D.
The periodic table is arranged by the outermost electrons of the elements.

pooja195 · Answer

what do you think?

anonymous · Answer

I think it's most likely D...

pooja195 · Answer

im thinking D might be correct all though i cant seem to see what i think but yeah D

anonymous · Answer

Okay thanks though I'll just research more. :)

pooja195 · Answer

haha welcome :) sorry =/

anonymous · Answer

No need to apologize the fact that you tried helps a lot thanks again! :D