PTT:

Write the complete nuclear symbol for a nucleus of chlorine that contains 17 protons and 20 neutrons.
If a nucleus of uranium has a mass number of 238, how many neutrons does it contain?
Is it possible for isotopes to be atoms of different elements? Explain why or why not.
How many neutrons are present in a nucleus whose atomic number is one and whose mass number is one?
Name the element of an isotope whose mass number is 206 and whose atomic number is 82.
How many protons and how many neutrons are present in a nucleus of Li−7?

OBJECTIVE:

Understand the process of radioactivity.