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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 changes the state of matter
C
a chemical change alters the identity of a substance
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
35
C
15
D
50
3) aluminum can be rolled into thin sheets because of its
A
magetism
B
solubility
C
ductility
D
malleability
4) Which of the following describes how to calculate atomic mass
A
add the number of protons and neutrons
B
subtract the number of electrons from the number of protons
C
add the number of electrons to the number of protons
D
add the electrons, protons, and neutrons of the atom
5) A carcinogen is
A
the chemical used in radiation treatment of cancer patients
B
any chemical that is known to cause cancer
C
a chemical used as a food preservative in dairy products
D
a chemical that causes birth defects, such as fetal alcohol syndrome
6) what is the difference between a synthetic element and a natural element
A
synthetic elements are not found in nature
B
synthetic elements can be used in chemical reactions
C
synthetic elements dissolve easily
D
natural elements do not combine with other atoms
7) Fetal alchol syndrome is an example of
A
mutagen
B
carcinogen
C
drug addiction
D
a teratogen, or birth defect
8) a child must take medicine in smaller doses than adults because
A
children have less body mass
B
children have a higher susceptibility to harmful chemicals
C
adults are often working and therefore exposed to more deadly chemicals
D
children are not as susceptible to diseases as adults
9) which of the following is an example of a chemical change
A
face blushing
B
ice cream melting
C
water evaporating
D
a nail rusting
10) how is density calculated?
A
mass multiplied by volume
B
mass subtracted from volume
C
volume subtracted from mass
D
mass divided by volume
*select an answer for all questions
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