Name
Date
Pd
Honors Chemistry – Unit 5 Review
1. For each of the following scientists, explain their contribution to the atomic
theory. Be able to sketch the model of the atom they proposed, describe any
experiments they conducted to lead to the development of their model, explain
problems with the previous model their model addressed, and identify problems
with their model that the next model addressed.
a.
Dalton
b.
J.J. Thomson
c.
E. Rutherford
d.
N. Bohr
e.
E. Schrodinger
2. Complete the following table from page 111 in your textbook:
Particle
Properties of Subatomic Particles
Symbol
Relative Charge
Relative Mass
Actual Mass
a. Which subatomic particles are in the nucleus?
b. Which subatomic particles have the same mass?
c. Which subatomic particle is likely to be the "key player" in chemical reactions?
Hint: Think about bonding!
Modeling Chemistry
1
U5 hon review 2015
3. Complete the following table. Where “Symbol” is written, include the nuclide
notation and any charge if the particle is an ion:
Symbol
54Mn
Atomic Number
35
Protons
2
19
Neutrons
2
20
18
Electrons
Mass Number
79
4. How many protons are in the nucleus of a copper atom? How do you know?
5. What must have happened to a neutral strontium (Sr) atom to cause it to form
strontium 2+ ion (Sr2+)? Explain your reasoning.
6. What must have happened to a neutral chlorine (Cl) atom to cause it to form a
chlorine 1- ion (Cl1-)? Explain your reasoning.
7. The relative abundances of the isotopes of Element X in nature are:
mass number = 204; 1.37%
mass number = 206; 26.26%
mass number = 207; 20.82%
mass number = 208; 51.55%
Calculate the average atomic mass and identify the element. Write the nuclide
notation of each isotope.
Modeling Chemistry
2
U5 hon review 2015