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Chemistry Review
Test Description: Students will review for their midterm test.
Instructions: Answer all questions to get your test result.
1) How is a chemical change different from a physical change?
A
a chemical change destroys atoms
B
a chemical change alters the identity of a substance
C
a chemical change changes the state of matter
D
chemical changes only take place in certain parts of the world
2) If five grams of sodium (NA) reacts with ten grams of chlorine, how many grams of table salt are formed?
A
25
B
15
C
35
D
50
3) aluminum can be rolled into thin sheets because of its
A
magetism
B
ductility
C
solubility
D
malleability
4) Which of the following describes how to calculate atomic mass
A
subtract the number of electrons from the number of protons
B
add the number of electrons to the number of protons
C
add the number of protons and neutrons
D
add the electrons, protons, and neutrons of the atom
5) A carcinogen is
A
a chemical used as a food preservative in dairy products
B
a chemical that causes birth defects, such as fetal alcohol syndrome
C
any chemical that is known to cause cancer
D
the chemical used in radiation treatment of cancer patients
6) what is the difference between a synthetic element and a natural element
A
natural elements do not combine with other atoms
B
synthetic elements can be used in chemical reactions
C
synthetic elements are not found in nature
D
synthetic elements dissolve easily
7) Fetal alchol syndrome is an example of
A
a teratogen, or birth defect
B
carcinogen
C
mutagen
D
drug addiction
8) a child must take medicine in smaller doses than adults because
A
children have a higher susceptibility to harmful chemicals
B
adults are often working and therefore exposed to more deadly chemicals
C
children are not as susceptible to diseases as adults
D
children have less body mass
9) which of the following is an example of a chemical change
A
a nail rusting
B
face blushing
C
ice cream melting
D
water evaporating
10) how is density calculated?
A
mass subtracted from volume
B
mass multiplied by volume
C
volume subtracted from mass
D
mass divided by volume
*select an answer for all questions
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