I don't profess to know the complete answer to this but pewter is made up of tin and copper and their atomic elements are tin = 50 and copper = 29. Maybe this will lead you in the right direction.
I don't profess to know the complete answer to this but pewter has tin and copper in it and the atomic element of tin is 50 and copper 29.
Maybe this will lead you in the right direction.
I've tried to answer this twice but computer says no so I'll try again.
I don't profess to know the complete answer to this but pewter contains copper and tin and the atomic element of tin is 50 and copper 29 so maybe this will lead you in the right direction.
because pewter is an alloy made up of tin,lead,copper.and antimony
and the sum in the question consists of the atomic numbers of the elements required to make pewter