1.Which of the following particles has/have the greatest charge in terms of magnitude?

	a.	electron
	b.	proton
	c.	neutron
	d.	a and b
	e.	all of these contain the same charge

2.Which of the following represents the charge on a proton?

	a.	e
	b.	1.6 x 10-19 coulombs
	c.	-e
	d.	both a and b
	e.	None of these

3.Which of the following represents the charge on a electron?

	a.	e
	b.	1.6 x 10-19 coulombs
	c.	-e
	d.	both a and b
	e.	None of these

4.A metallic sphere contains a charge of -6.52 x 10^-15 coulombs. The extra electrons evenly spread over the surface of the sphere. How many extra electrons are on the sphere?

Please provide all answer with the steps.