How many nitrogen atoms should appear on the right side of this equation 2AgNO3+Cu=?

Sorry i dont understand the question can you rephase it?

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

Answer the molar mass of magnesium is 24.305g/mol.