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Chemistry Review
Test Description: STAAR Review
Instructions: Answer all questions to get your test result.
1) Which element is a poor conductor of heat?
A
Cu
B
Al
C
Ca
D
Ar
2) What do the elements S,N,P and BR have in common?
A
They have same thermal conductivity
B
They have the same number of protons
C
They are noble gases
D
They are nonmetals
3) Arsenic,a poison, has an atomic number of 33. It is classified as a-
A
actinide
B
metalloid
C
non-metal
D
metal
4) Bromine in group 17 is not accurately described as...
A
malleable, ductile
B
liquid, reddish brown in color
C
very reactive
D
mass 79.904
5) How many valence electrons does carbon have?
A
3
B
4
C
1
D
2
6) How can you find elements with chemical properties similar to other elements?
A
period number
B
group number
C
atomic number
D
no number
7) What does the atomic number tell you?
A
element identity
B
all choices correct
C
number of protons
D
number of electrons
8) What do the periods tell you?
A
energy levels
B
reactivity
C
metal classification
D
neutron number
9) mass of the atom is located where?
A
electron cloud
B
center
C
nucleus
D
2nd energy level
10) what determines reactivity?
A
valence electrons
B
Protons
C
neutrons
D
electrons
*select an answer for all questions
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