CHM 110-01 and 02: Homework Assignment 3
CHM 110 Homework 3
Sections 1 and 2 (Tuesday/Thursday)
Due: On or before 2/5/13 at 11:00 AM
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Name: ___________________________
Follow the directions for each part, and write answers in the provided blanks.
Find the requested information using the periodic table. [2 points each]
potassium
1) ____________________
The name of an element whose symbol is K
107.9
2) ____________________
The atomic weight of the element whose atomic number is 47
metalloid
3) ____________________
The type of element silicon is (metal/nonmetal/metalloid)
4) ____________________
The type of element molybdenum is (metal/nonmetal/metalloid)
metal
5) ____________________
The atomic number of tellurium
52
6) ____________________
The atomic symbol of rhenium
Re
7) ____________________
The number of neutrons in the nucleus of an atom of carbon-14
8
56
8) ____________________
The number of electrons in a neutral atom of Ba
23
9) ____________________
The number of protons in the nucleus of an atom of vanadium
47
10) ____________________
The number of electrons in a neutral atom that contains 47 protons
Using the periodic table, predict the charges of the ions formed from these elements. [4 points
each]
+3
11) __________
Aluminum
-1
12) __________
Chlorine
13) __________
Sulfur
-2
14) __________
+1 Potassium
15) __________
Phosphorus
-3
CHM 110-01 and 02: Homework Assignment 3
Write the chemical formulas of these ionic compounds. [5 points each]
16) ____________________ sodium sulfide
17) ____________________ iron(II) chloride
18) ____________________ copper(I) nitride
19) ____________________ ammonium phosphate
20) ____________________ calcium nitrate
21) ____________________ chromium(III) oxide
Write the chemical name of these ionic compounds. [5 points each]
22) beryllium
____________________
nitrate Be(NO3)2
23) copper(II)
____________________
nitride Cu3N2
24) calcium
____________________
hydroxide Ca(OH)2
titanium(IV) sulfate Ti(SO4)2
25) ____________________
chloride SrCl2
26) strontium
____________________
27) ____________________
ammonium sulfide (NH4)2S
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