How many different elements are there in 4AgNO3

What is the maximum number of electrons that an atomic orbital can contain?

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth

How are isotopes of the same element alike?