HM Chemistry Unit 3/4 Study Guide
1) Label all of the parts of the wave below:
2) For the following, define and give the unit of measure:
a) Wavelength
b) Frequency
Use the chart below to answer the following two questions:
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What wave has a frequency of 1014 Hz?
What wave has a wavelength of approximately 10-8 meters?
Put the colors of the visible spectrum in order from least energy to most energy.
Which color has the longest wavelength? The shortest?
Which color has the highest frequency? The lowest?
If a photon has a frequency of 7.9 x 1013 Hz, what is its energy? Use E=hv, where h=6.626 x 10-34 J*s.
What is the frequency of a light wave in a vacuum with a wavelength of 540 nanometers? Use C= /v where C=
3.00 x 108 m/s.
A photon is emitted with energy of 3.65 x 10-20 J. What is the wavelength of the photon? Assume speed of
light is applicable.
Draw the different orbitals. You may want to look in a textbook.
What is the electron configuration for:
a) Ti
b) Cl
c) Fe2+
d) O2How many valence electrons do each of the above examples have?
Draw the electron dot structure for bromine.
In the figure below, label the names and valence electrons of each group:
16) As you move across the periodic table from A) left to right, and B) top to bottom, what happens to the
following trends?
a) Electron affinity
b) Electronegativity
c) Ionization energy
d) Atomic radius
17) Give definitions for the following:
a) Electron affinity
b) Electronegativity
c) Ionization energy
d) Atomic radius
e) Metal (also give an example and one property)
f) Nonmetal (also give an example and one property)
g) Metalloid (also give an example and one property)
18) Put the following in order of increasing atomic/ionic radius:
a) Na, Na+
b) S, Mg
c) F, F-, F+
d) K, Rb, Fr
e) O, O219) Write the electron configuration AND orbital notation for the following:
a) Co
b) Si
c) Na
20) If this atom were to form an ion, which would it form?
21) In the interaction between sodium and chlorine to make sodium chloride, which atom gains
electrons? Which atom loses electrons?
22) Atom A has 2 valence electrons. Atom B has 6 valence electrons. What compound would form from
A and B? (A and B are the element symbols, just add the subscripts to form the formulas.)
23) When group 1 elements combine with group 7 elements, the ratio of atoms is 1:1. Combine the
other main groups and find their ratios.
24) What charges do each main group elements have? How is that different/similar to their valence
electrons?
25) In a sample of sodium phosphide, I count 21 sodium atoms. How many phosphorous atoms are
present?
26) List the diatomic elements.
27) Define: reactants, products, Law of Conservation of Matter, precipitate
28) Give a chemical and real-world example of each of the five types of chemical reactions.
29) List and label the 4 states of compounds/elements/molecules that we use in chemical equations.
30) How many total atoms are in 2H2O?
31) Be able to tell me what’s happening to the electrons in an ionic and covalent interaction AND why
the atoms stay together.