Answer: The image from the question has the correct answers.
Explanation:
As summarized in the attached table.
Substances that cannot be separated and found on a periodic table are elements.
<em>the</em><em> </em><em>number</em><em> of</em><em> </em><em>nitrogen</em><em> </em><em>atoms</em><em> </em><em>in</em><em> </em><em>the </em><em>compound</em><em> </em><em>is</em><em> </em><em>two</em>
Test it i guess i dont completely understand the question