Metal usually donates electrons. The concept behind this phenomenon is stability. The elements with the most stable electronic configuration are the noble gases in Group 5A. As a result, the other elements donate or accept electrons so that they would be like the noble gases. Since metals are past their nearest noble gas element, they have to shed their electrons. When they do, they become cations which are positively charged ions.
The answer is D. His belief is was that atoms could not be split. That is what was disproved really fast ;)
Answer: a single compound
Explanation: I know it
What they have in common is that they both have the same number of atoms.