I believe that what is meant here to be particle unit is the elementary charge of the compound SO4^2-. In this case, the whole compound is raised to the power of 2-, therefore the elementary charge is 2-, this is the total electrons that the compound is carrying or sharing. These 2 electrons are being shared with 2 hydrogen atoms to form H2SO4.
Answer:
2-
Answer: The particle unit is an ion.
Explanation: The unit which is common used for the substances is Mole. 1 mole of anything equals to Avogadro number which is [tex]6.022*10^2^3[/tex] .
For example, 1 mole of an electron equals to [tex]6.022*10^2^3[/tex] electrons,
1 mole of an atom equals to [tex]6.022*10^2^3[/tex] atoms.
So, 1 mole equals to [tex]6.022*10^2^3[/tex] particles.
[tex]SO_4^-^2[/tex] is sulfate ion. So, the particle unit for this will be an ion.
