Carbon Dioxide is formed when two oxygen atoms chemically combine with a carbon atom. The term that will best describe carbon dioxide is a compound. That will make the correct answer D.
<span>I bet this is the notation used in nuclear reactions. The superscript represents the mass number while the subscript represents the atomic number of the element X. So, we find the element with an atomic number of 12. That would be Magnesium or Mg.</span>
%C= 12/12 + 2·16=0,273=27,3%.
Answer:
group two elements are called alkaline earth metals
Explanation:
Because their oxides form in the earth and are water soluble
