The variable is what changes during an experiment. Hopefully this helped! :)
<span>Each atom in an ionic compound tends either to empty or complete the shell to 8 electrons. So when the number of electrons on the external shell is near 8 , the atom tends to attract electrons to complete the shell giving a positive ion called anion
Conversely when the number of electrons is small the atom gives these electrons to form a positive ion called a cation</span>
25 gigaseconds is equal to 2,500,000,000,000 centiseconds
the poly atomic molecule is H2
