Question

The diameter of zinc atom is 2.6 Å. Calculate (a) radius of zinc atom in pm and (b) number of atoms present in a length of 1.6 cm if the zinc atoms are arranged side by side lengthwise.

Symbols 35/79 Br and 79Br can be written, whereas symbols 79/35 Br and 35Br are not acceptable. Answer briefly.

Calculate the atomic mass (average) of chlorine using the following data: | Isotope | % Natural Abundance | Molar Mass | |---------|--------------------|-----------| | 35Cl | 75.77 | 34.9689 | | 37Cl | 24.23 | 36.9659 |

What will be the mass of one 12C atom in g?