Chemistry Form 3

Form 3 CHEMISTRY Trinity Term                                     WEEK: May 18 – May 22

Teacher: Leon Abel                                                                 My e-mail: leonabel8@gmail.com

Topic: Atomic Structure – Read carefully, then use your notes and/or other resource materials to answer the questions

1.     Which particle(s) in the atom is/are responsible for the

a.      mass of the atom

b.     volume of the atom

2.     Define the following terms:

a.      Atomic mass

b.     Mass number

c.      Isotope

3.     For each of the following nuclear notations, give the number of protons, electrons and neutrons:

a.      ¹¹₅B

b.     ²³₁₁Na

c.      ⁴⁰₂₀Ca

4.     Give the similarities and differences between the two isotopes of sodium, sodium-23 and sodium-24

5.     Explain what a radioactive isotope is.

You may use the following video to assist you: