1. As you go across a period, what is a useful comparison point? A.
oxides
B.
halides
C.
hydrides
D.
hydroxides

2. Most elements are
A.
allotropes
B.
nonmetals
C.
metalloids
D.
metals

3. A metalloid is a(n) __ conductor of heat and electricity than a metal.
A.
better
B.
worse
C.
equal
D.
cannot be determined

4. What causes the formation of allotropes?
A.
pressure
B.
light
C.
temperature
D.
all of the above

As you move __and __ elements become more metallic.
A.
left, down
B.
right, down
C.
right, up
D.
left, up

5. All of the following metalloids form allotropes except
A.
B
B.
Si
C.
Te
D.
Po

6. What is a chemical property of a metal?
A.
malleable
B.
ductile
C.
positive oxidation states
D.
conducts heat and electricity