Rohan Singh (anonymous) doubts approved

sir, in your video lecture you have said about Thomson model of atom:-
1> Atom is a sphere of positive charge with electrons embedded in it
2>magnitude of positive and negative charge is same inside atom, so net charge is zero.
if net charge is zero then why it is said that atom is a sphere of positive charge with electrons embedded in it, we can that atom is the magnitude of positive and negative charge is same inside atom, so net charge is zero. Explain.