Which among the following elements has highest number of atoms in 1 ~g each ? (at. no. Au =197, Na =23, Cu =63 5, Fe =56 )

Step-by-step solution

i. 1 ~g Fe = 1 56 ~mol = 1 56 6.022 10²³ atoms of Fe ii. Au = 1 197 ~mol = 1 197 6.022 10²³ atoms of Au iii. 1 ~g Na = 1 23 ~mol = 1 23 6.022 10²³ atoms of Na iv. Cu = 1 63.5 ~mol = 1 63.5 6.022 10²³ atoms of Cu Hence, 1 ~g of Na has highest number of atoms.