What element has 81 protons in the nuclei of its atoms? 

A. Thallium
B. Uranium
C. Platinum
D. Lead

A?

9 answers

I don't know anything about chemistry. You might find your answer in one of these sites.

http://www.google.com/#q=what+element+has+81+protons+in+the+nuclei+of+its+atoms
   What type of map is best suited for maritime navigation? 

A. Topographic
B. Mercator projection
C. Geologic
D. Conic projection 

B?
Yes, B.
What are the three particles of an atom? 

A. Electron, proton, and isotope
B. Proton, neutron, and electron
C. Neutron, electron, and ion
D. Proton, ion, and valencium 

B?
      
I don't know.

Please post this question with Chemistry as your school subject!
B is correct.

Atoms are made up of Protons, Neutrons, and electrons. I know this off the top of my head.

I hope this helps! :)

P.S. Please look at the post with your diamond question and scientific notation question.
Thank you, Brady.
You're welcome, Ms. Sue. :)
Which statement best describes the composition of magma