NAME: ________________________
SCORE:
/18
Atomic Structure Quiz
Part I. Answer the questions.
1. List the subatomic particle(s) present in the nucleus of the atom. (1 point)
2. List the subatomic particle(s) present in the clouds of the atom. (1 point)
3. Atomic _____________ is the amount of protons and neutrons in the atom. (1 point)
4. Atomic _____________ is the amount of protons in the atom. (1 point)
5. This atom initially had 50 electrons, but it lost four. What is the term for when electrons are
gained or lost? (1 point)
6. How would I write an isotope of Iron with 28 neutrons? (1 point)
7. Which subatomic particle determines the identity of the element and can this number ever
change and still be the same element? Why or why not? (2 points)
Part II. Fill in the missing information regarding each element. (1 point each)
Element name/ Isotope name/ Ion
Symbol
Sodium
# of p+
11
# of n0
# of e-
8. ______
9. _______________________
28
32
Al 3+
13
14
Osmium
Silicon-30
Vanadium-50
14. _________________________
11. _______
14
13.
_________
8
114
12. ________
11
28
10. _______
76
14
27
23
8
10
Part III. Calculate the average atomic mass for the following element. Show all work! Round to
two decimal places. (3 points)
Naturally occurring strontium consists of four isotopes, Sr-84 with a 0.56% abundance, Sr-86 with a
9.86% abundance, Sr-87 with a 7.00% and Sr-88 with a 82.58%. Calculate its average atomic mass.