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Chemistry Pretest Flashcards | StudBud
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Chemistry Pretest
Chemistry Pretest
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A test of your pre- chemistry knowledge
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
(LT 11) Propane has 3 atoms of carbon and 8 atoms of hydrogen. What is the chemical formula?
C3H8
3C + 8H
C3H8
3C8H
2
(LT 10) You have discovered a new element that has 8 Valence electrons. It should be in group
8 A also called 18
1 A
7 A also called 17
2 A
3
(LT 8) Which 2 groups of the Periodic Table would most easily combine to form a compound?
Group 1 A and 7 A
Group 5 A and 7 A
Group 2 A and 8 A
Group 1 A and 2 A
4
(LT1) Which part of the diagram represents the part of an atom with the most mass?
B
C
D
A
5
(LT 15) Which equation below is balanced?
Al + O2 → Al2O3
CO2 + H2O → H2CO3
H2 + O2 → H2O
H2 + O2 → 2H2O
6
(LT 7) What particle is used to identify a carbon atom?
Electrons
the nucleus
Protons
Neutrons
7
(LT 6) What is Carbon’s atomic mass?
12.011
18.01
6
12
8
(LT 5) What does the atomic number represent?
number of protons and electrons in a neutral atom
number of neutrons
number of particles in the nucleus
number of electrons
9
(LT 3 ) Where can you find the neutron?
The particle with no charge in the atom's nucleus
The positive particle in the atom's nucleus
The negative particle in the atom's nucleus
The negative particle on the atom's rings
10
(LT 9) Elements that are in the same group have ....
Very different chemical and physical properties
Identical chemical and physical properties
The same number of subatomic particles
Similar chemical and physical properties
11
(LT 4) Where can you find the electron?
The particle with no charge in the nucleus
The positive particle in the nucleus
The negative particle in the nucleus
The negative particle on the rings
12
(LT 2) What subatomic particle has a positive charge?
Quarks
Neutrons
Electrons
Protons
13
(LT 13) A chemical change occurs as a liquid turns to solid or gas.
Both
Neither
False
True
14
(LT14)Chlorine & sodium are toxic. Why can the sodium chloride compound known as salt be eaten?
Compounds have different properties than elements
Mixtures have different properties than elements
Acid in our stomachs helps to digest them
15
(LT 12) How many atoms are found in this chemical formula 3CaCl
2
?
9
2
5
3
16
(LT 15) The law of conservation of mass states that ______
Mass is the same before and after a reaction.
All of the above
Matter is not created or destroyed
The mass of the reactants equals the mass of the products.
17
(LT 6) What does the atomic mass represent?
number of protons
number of protons plus the average number of neutrons
the number of electrons
number of energy levels
18
(LT 5) What is Carbon’s atomic number?
6
12
12.01
18.01
19
(LT 13) Which is an example of a chemical change?
Gold melting
Iron rusting
Salt dissolving
water freezing
20
(LT 8) What particle determines the chemical properties of an atom?
Electrons
Protons
Neutrons
Nucleus
