Download – Units 5-7 Review Honors Chemistry Unit 5

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Date
Pd
Honors Chemistry – Units 5-7 Review
Answer the following questions on a separate sheet of paper where space is insufficient.
Unit 5
1.
2.
3.
4.
5.
6.
7.
Describe the progression of our understanding of atomic structure, including
the atomic model and instrumentation utilized by the following scientists:
a.
John Dalton
b.
J. J. Thompson
c.
E. Rutherford
d.
N. Bohr
e.
E. Schrodinger
How many electrons does a sulfide ion have?
How many protons, neutrons, and electrons are in Nickel-58?
The element copper is found to contain the naturally occurring isotopes
29Cu63 and 29Cu65. The relative abundances are 69.1% and 30.9%
respectively. Calculate the average atomic mass of copper.
Ninety-two percent of the atoms of an element have a mass of 28.0 amu, 5.0% of
the atoms have a mass of 29.0 amu, and the remaining atoms have a mass of
30.0 amu. Calculate the average molar mass and identify the element.
Antimony (Sb) exists in two stable isotopes, Sb-121 and Sb-123. From the
average atomic mass found in the Periodic Table, determine the relative
abundances of these two isotopes.
Fill in the following table for neutral atoms or ions of each element.
Symbol
15
7
Atomic
Number

Protons
Pb 2
16
Neutrons
8
Electrons
7
Mass
Number
207
82
N
125
18
32
Unit 6
Use the following formulas and constants for the calculations below.
c = f
E = hf
8.
9.
10.
11.
12.
13.
14.
15.
16.
c = 3.00 x 108 m/s
h = 6.62 x 10-34 Js
What is the wavelength of the radiation whose frequency is 5.00 x 1015 s-1?
In what region of the electromagnetic spectrum is this radiation?
An inexpensive laser that is available to the public emits light that has
a wavelength of 670 nm. What are the color and frequency of this
radiation?
What is the energy of a photon with a frequency of 2.22 x 1014 s-1?
What is the frequency of a photon with energy equal to 6.00 x 10-15 J?
How many sublevels are in the following energy levels?
a.
n=1
d.
n=4
b.
n=2
e.
n=5
c.
n=3
f.
n=6
How many orbitals are in the following sublevels?
a.
1s sublevel
d.
4f sublevel
b.
5s sublevel
e.
6d sublevel
c.
4d sublevel
What are the types of sublevels and number of orbitals in the following
energy levels?
a.
n=1
d.
n=4
b.
n=2
e.
n=5
c.
n=3
f.
n=6
Write a complete electron configuration for phosphorus, P, chromium, Fe
and gold, Au.
Define valence electron. How is the number of valence electrons of an
element related to the group/family number?
Choose the correct response for multiple choice questions 17 and 18.
17.
The quantum mechanical model of the atom _____.
a.
is concerned with the probability of finding an electron in a certain
position
b.
was proposed by Niels Bohr
c.
defines the exact path of an electron around the nucleus
d.
has many analogies in the visible world
18.
In order to occupy the same orbital, two electrons must have _____.
a.
the same direction of spin
b.
low energy
c.
opposite charge
d.
opposite spin
Unit 7
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
Arrange the following groups of atoms in order of increasing atomic radius.
a.
As, N, F
b.
S, Cl, F
c.
Cs, Li, K
Consider the following atoms: Ne, Na, Mg.
a.
Which atom has the largest first ionization energy? Explain.
b.
Which atom is least likely to form a bond? Explain.
For each of the following pairs of elements, (Li and K) and (S and Cl), pick
the atom with:
a.
higher ionization energy
b.
larger size
Why does atomic size generally increase as you move down a group of the
periodic table and decrease as you move from left to right across a period?
State the general characteristics of three major families: the noble gases, the
alkali metals and the halogens.
State the trends in physical and chemical properties across a given row
of the periodic table. Include:
a.
metallic vs. nonmetallic characteristics
b.
atomic size
c.
attraction for electrons
Describe the formation of an ion from a metal and a nonmetal using the octet
rule and the importance of noble gas electron configurations.
Use electron dot structures to predict the formula of the ionic compounds
formed when the following elements combine.
a.
calcium and iodine
b.
aluminum and oxygen
Which of these combinations of elements are most likely to react to form ionic
compounds? (Choose all that apply.)
a.
sodium and magnesium
b.
barium and sulfur
c.
potassium and iodine
d.
oxygen and argon
Draw the electron dot structure for phosphorus trifluoride, PF3.