Calculate
1- Positive ions
2- Negative ions
3- Total number of H2SO4

1- there are three positive ions

2- there are four negative ions

3- check below

Explanation:

1- I say three cations because there are 2 atoms of H (H has a charge of +1) and 1 atom of S (S has a charge of +6 in this compund) (cations are positive ions)

2- There are four anions because there are 4 atoms of O (O has a charge of 2- in this compound) (anions are negative ions)

3- Sorry, can you elaborate on the last question? I don't understand it.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)