Answer:
Element
Explanation:
The symbol for gold is Au which only has one capital letter. This means that there is only one thing that makes up gold which would make it an element.
hope this helps :)
Yeah, a lot faster than sound.
Answer:
The famous oil drop experiment exploits that fact that an oil drop in an electronic field will get negative charge accumulation which can be balanced and observed in order to determine the charge of an electron.
The percent composition of each element can be calculated as follows:
% composition = (mass of element / total mass) * 100
The total mass of the quarter is given to be 5.670 grams
Mass of Cu = 5.198 grams
Mass of Ni = 0.472 grams
Substitute in the above equation to get the mass percentage of each element as follows:
% of Cu = (5.198/5.670) * 100 = 91.675%
% of Ni = (0.472/5.670) * 100 = 8.325%
ADD THEM all, and then divide by four. Thats what I would do!
