Protons - have mass 1,67 x 10(-24)g, positive charge and it is situated in nucleus.
Neutrons - have mass the same like protons, but have no charge and they are placed in nucleus, too.
Electrons - have mass 9,1 x10(-28)g, negative charge and they are situated in electronic cover.
Protons and electrons have same charge (1,6 x10(-19)C) but different kinds - protons are positive and electrons are negative.
Answer:
a) 4.681*10^10 electrons
b) 3.67*10^12 electrons
Explanation:
The amount of electrons in a charge of 1C is:

You use the previous equality as a conversion factor.
a) The sing of the charge is not important in the calculation of the number electrons, so, you use the absolute value of the charge

In 7.50nC there are 4.61*10^18 electrons
b)

To obtain a charge of 0.580 µC in a neutral object you need to take out 3.67*10^12 electrons
You will see some thing pitch black pulling you. you will feel an immense pull or attraction while going rapidly inside the black hole.
This is too late too answer?