1. GENERAL CHEMISTRY-I (1411)
S.I. # 5
1. Define atomic number: __________________________________________
Define mass number: __________________________________________
Which of these can vary without changing the identity of an element?
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2. How many protons, neutrons, and electrons are in the following atoms:
a. 40Ar _________ p, __________ n, ___________ e
b. 65Zn _________ p, __________ n, ___________ e
c. 70Ga _________ p, __________ n, ___________ e
d. 80Br _________ p, __________ n, ___________ e
e. 184W _________ p, __________ n, ___________ e
f. 243Am _________ p, __________ n, ___________ e
3. Locate each of the following elements in the periodic table; indicate whether it is
a metal, metalloid, or nonmetal and give the name of the element.
a. Na Name:____________ Class: ____________
b. Ti Name: ____________ Class: ____________
c. Ga Name: ____________ Class: ____________
d. U Name: ____________ Class: ____________
e. Pd Name: ____________ Class: ____________
f. Se Name: ____________ Class: ____________
g. Kr Name: ____________ Class: ____________
h. As Name: ____________ Class: ____________
4. Predict the charges of the ions of the following elements:
a. Mg _______
b. Al _______
c. K _______
d. S _______
e. F _______
f. Sr _______

2. g. Sc _______
h. P _______
i. I _______
j. Se _______
5. Predict the chemical formula and name of the compound formed by the following
a. Ga and F _______ _____________________
b. Li and H _______ _____________________
c. Al and I _______ _____________________
d. K and S _______ _____________________
6. Predict the chemical formulas of the compounds formed by the following pairs of
ions: a. Cu+ and S2- _____________________
b. Fe3+ and O2- _____________________
c. Hg22+ and CO32- _____________________
d. Ca2+ and AsO43- _____________________
e. NH4+ and CO32- _____________________
7. Predict which of the following are ionic and which are molecular:
a. PF5 _____________________
b. NaI _____________________
c. SCl2 _____________________
d. Ca(NO3)2 _____________________
e. FeCl3 _____________________
f. LaP _____________________
g. CoCO3 _____________________
h. N2O4 _____________________
8. Name the following ionic compounds:
a. Li2O _____________________
b. NaClO _____________________
c. Sr(CN)2 _____________________
d. Cr(OH)3 _____________________

3. e. Fe2(CO3)3 _____________________
f. Co(NO3)2 _____________________
g. (NH4)2SO3 _____________________
h. NaH2PO4 _____________________
i. KMNO4 _____________________
j. Ag2Cr2O7 _____________________
9. What is a hydrocarbon? Give an example.
10. What is a functional group?
11. What does it mean when the (--OH) functional group is attached to a
hydrocarbon?