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