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1.
(1 point)
Which element is found in potassium chlorate and zinc nitrate?
Hydrogen
Oxygen
Potassium
Zinc
2.
(1 point)
Atoms of which element have the weakest attraction for electrons?
Na
P
Si
S
3.
(1 point)
Which element is classified as a metalloid?
Sulfur
Silicon
Barium
Bromine
4.
(1 point)
Which metal is most likely obtained by the electrolysis of its fused salt?
Au
Ag
Li
Zn
5.
(1 point)
Because of its high reactivity, which element is never found free in nature?
O
F
N
Ne
6.
(1 point)
Iron corrodes more easily than aluminum and zinc because aluminum and zinc both
Are reduced
Are oxidizing agents
Form oxides that are self-protective
Form oxides that are very reactive
7.
(1 point)
Which substance is produced by the Haber process?
Aluminum
Ammonium
Nitric acid
Sulfuric acid
8.
(1 point)
What is the total number of moles of hydrogen atoms contained in one mole of (NH
4
)
2
C
2
O
2
?
6
2
8
8
4
9.
(1 point)
The observed regularities in the properties of elements are periodic functions of their
Atomic numbers
Mass numbers
Oxidation states
Nonvalence electrons
10.
(1 point)
Which physical characteristic of a solution may indicate the presence of a transition element?
Its density
Its color
Its effect on litmus
Its effect on phenolphthalein
11.
(1 point)
Which element has a crystalline lattice composed of positive ions through which electrons flow freely?
Bromine
Calcium
Carbon
Sulfur
12.
(1 point)
Red litmus paper will turn blue when placed in an aqueous solution of
KCl
KOH
CH
CH
3
COOH
13.
(1 point)
Equilibrium is attained in a chemical cell when cell voltage is equal to
+1.00 V
+2.00 V
0.00 V
-1.00 V
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