Learning objective



1) How many protons and neutrons are ther in the nucleus of
a) Oxygen O 18/8
b) tin Sn 120/50

2) For Pb 208/82 find:
a) the net electrical charge of the nucleus.
b) the number of Neutrons.
c) the number of Nucleons.
d) the approximate radius of the nucleus.
e) the nuclear density.

3) An unknown nucleus contains 70 Neutrons and has twice the volume of the nickel Ni 60/28 nucleus. Identify the unknown nucleus in the form X a/z. Use the periodic table if needed.