Question

Please Help!!
Physical Science!!

5 Questions!

1.) adding a neutron to an atom, can change what property of an atom?


If a mass of a radioactive is 8 grams and it has a half life of4 hours how much mass remains after 8 hours?

3.) the atomic mass of common krypton is 84 and its atomic number is 36 krypton 82 has how many neutrons within each isotopes

4. why are some isotopes used as tracers?


5.) all isotopes of a particular element have the same atomic number, how then do the isotopes of a particular element differ?

Answer 1

Please Someone Help!