Name:_______________________________________________________________________________
Honors Chemistry: Unit 3 Test –A Chemist’s Best Friend _PRACTICE
_____
/ XXX Pts
Period:______
RECALL- I have already provided you with a list of key understandings and abilities that you must be able to do. What follows is a FEW examples of questions and formats
that MIGHT appear on the upcoming unit test.
Key Understandings:
and Abilities:
1. Know the difference between a period, row, column and group as they relate to
the Periodic Table.
2. Know the difference between an energy level/shell, subshell/sublevel, and an
orbital in terms of the electron cloud.
3. Know the relationship between the groups and periods of the Periodic Table and
the electron cloud.
4. Know the connection between Main Group # and the # of valence of electrons.
5. Know what the octet rule is.
6. Know the definitions and relationships between shielding effect and effective
nuclear charge.
7. Know what a mole is.
8. Know how to interpret a chemical formula.
1. Be able to classify an element as a metal, metalloid, nonmetal, main group or
transition based on its position on the Periodic Table.
2. Be able it classify an element as either a member of the alkaline metals, alkaline
earth metals, halogens or noble gases based on its position on the PT.
3. Be able to describe the electron cloud and its levels of organization.
4. Be able to draw Bohr Diagrams for elements #1-20 using the PT as a guide.
5. Be able to define and explain the following trends on the PT based on nuclear
charge and shielding effect; atomic radius, ionization energy, electronegativity,
metallic character and nonmetallic character.
6. Be able to determine the molar mass of an element and of a compound.
7. Be able to use Dimensional Analysis to convert between
a. mass
b. molar mass
c. # of atoms
d. # of particles.
Instructions: Provide a response for each question identifies what feature of the Period Table corresponds to the following information LEGIBLE in the space provided.
1. Total # of e― in an atom =
__________________________________ 3. # of valence e― in an atom =
2. Total # of energy levels in an atom =
__________________________________ 4. # of e― in an energy level =
__________________________________
_____________________________________________________________________________________________________
5. # of
e―
in the kernel of an atom =
___________________________________
Instructions: Provide a response for each question that is well thought out, satisfies the prompt, is clearly explained, and LEGIBLE.
1. What is the shielding effect?_________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________________
2. Explain the difference, and cause of the difference between nuclear charge and effective nuclear charge:____________________________________________________
__________________________________________________________________________________________________________________________________________
Instructions: For each trend, correctly describe the nature of the trend down a group and left to right across a period. Then explain the reasoning behind this trend in terms
of energy levels/shielding effect and nuclear charge/effective nuclear charge. Your response must contain an explanation that is well thought out, satisfies the terms noted
previously, and LEGIBLE.
3. The Periodic Trend X ( increases / decreases ) down a group, ( increases / decreases ) left to right across a period as :______________________________________
__________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________
Instructions: For each set of elements, arrange them in the desired order (increasing / decreasing ) for the Periodic Trend noted.
8. Elements: Al, B, C, K, and Na.
Trend: Atomic Radius
smallest _____ _____ _____ _____ _____ largest
9. Elements: Ca, Rb, P, Ge, and Sr.
Trend: Metallic Character
largest
_____ _____ _____ _____ _____ smallest
Instructions: For each of the following chemical species, identify the nuclear charge and # of electrons present in the atom and then construct a Bohr
Diagram of the element.
Element
Nuclear Charge # = ____
# e- = ____
Element
Nuclear Charge # = ____
# e- = ____
Element
Nuclear Charge # = ____
# e- = ____
Element
Nuclear Charge # = ____
# e- = ____
PT Basics: On the Periodic Tables below shade/color the element “boxes” appropriately to match the key provided for you for each one (Key on TOP,
shade/color on P.T. on Bottom)
= Main Group Elements
= Inner Transition Elements
Calculations: Answers need to be correct, possessing, the proper number of rounded significant figures, and the correct units. Work must be shown that is thorough,
clearly shows use of units in calculation, and legible with answers boxed (NW=NC). In other words…ALL RULES APPLY. Please use the provided separate sheet of paper
to show all work and answers. Ensure all problems are in order and numbered.
22. 1.24x1021 particles of UF6 ore would equal how many grams?
26. 9.06 x1014 particles of hazardous NH4ClO4 were created when a careless
student mixed bleach with Windex. How many grams were produced?
23. 134.5 g of Fe(CN)3 is equivalent to how many particles?
27. How many atoms of silver are in 72.3 g of Ag3N?
24. How many moles are in 2.42 x1025 particles of Fe(OH)2?
28. A mine collects 124 metric kg of Fe2(SO4)3 in a single day. How many atoms of
Fe is this?
25. Al(NO2)3 is an industrial waste product. How many kilograms of waste are
present if 5.62 x1042 particles of Al(NO2)3