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- 1. Multiple Choice
Which defines an atom?
Building Block of energy
Building Block of matter
charged particle
smallest particle
- 2. Multiple Choice
The smallest piece of an element:
quark
electron
shell
atom
- 3. Multiple Choice
Protons and neutrons are found in the center of the atom called the:
nucleus
neutron
shell
cell
- 4. Multiple Choice
Classification system for elements is called:
Elements
Periods
The Periodic Table of Elements
Families
- 5. Multiple Choice
The subatomic particles are called:
protons, nucleus and electrons
protons, electrons and neutrons
protons, positives and negatives
cloud, shell and quarks
- 6. Multiple Choice
Substances that have only one kind of atom are called:
elements
nitrogen
electrons
nucleus
- 7. Multiple Choice
Electrons have a _____ charge.
neutral
negative
positive
both positive and negative
- 8. Multiple Choice
The abbreviation for an element:
element name
atomic number
chemical symbol
atomic symbol
- 9. Multiple Choice
What is the sum of an atom's protons and neutrons called?
atom
atomic theory
atomic mass
atomic number
- 10. Multiple Choice
The _____ is based on the number of protons in the nucleus of the atom.
atomic structure
periodic table of the elements
atomic number
atomic mass
- 11. Multiple Choice
What subatomic particle is represented by this symbol (+):
neutron
proton
electron
- 12. Multiple Choice
What subatomic particle is represented by this charge (-):
neutron
proton
electron
- 13. Multiple Choice
Why do the electrons surround the nucleus?
the negative electrons are attracted to the neutral neutrons
the negative electrons are repelled by the neutral neutrons
the negative electrons are attracted to the positive protons
the negative electrons are repelled by the positive protons
- 14. Multiple Choice
All matter is made of _____.
light
energy
cells
atoms
- 15. Multiple Choice
Formed when two or more elements are joined chemically
element
proton
compound
electron
- 16. Multiple Choice
What subatomic particle is found in the space surrounding the nucleus of an atom?
protons
electrons
neutrons
- 17. Multiple Choice
How can you find the # of neutrons in an atom?
protons + electrons
atomic mass + protons
atomic # - protons
atomic mass - atomic #
- 18. Multiple Choice
Which subatomic particle has a neutral/no charge?
protons
neutrons
electrons
- 19. Multiple Choice
Which subatomic particle has a positive charge?
protons
neutrons
electrons
- 20. Multiple Choice
If an element has an atomic # of 3 and an atomic mass of 7, what is the total number of protons?
3
4
7
10
- 21. Multiple Choice
If an element has an atomic # of 3 and an atomic mass of 7, what is the total number of neutrons?
3
4
7
10
- 22. Multiple Choice
If an element has an atomic # of 3 and the # of neutrons is 4, what is the # of electrons?
3
4
7
10
- 23. Multiple Choice
Which letter represents the element's name?
a
b
c
d
- 24. Multiple Choice
Which letter represents the element's atomic number?
a
b
c
d
- 25. Multiple Choice
Which letter represents the element's atomic mass?
a
b
c
d
- 26. Multiple Choice
Which letter represents the element's symbol?
a
b
c
d
- 27. Multiple ChoiceWhich element has an atomic number of 1?LithiumOxygenHydrogenFrancium
- 28. Multiple ChoiceWhich element has an atomic number of 6?CarbonNitrogenXenonSodium
- 29. Multiple ChoiceWhich element has an Atomic Number of 10?Neon (Ne)Calcium (Ca)Gold (Au)Potassium (K)
- 30. Multiple ChoiceWhich element has the HIGHEST atomic number out of the following? (HINT - They are all in the 1st column)Hydrogen (H)Lithium (Li)Sodium (Na)Potassium (K)
- 31. Multiple ChoiceWhich element has the LOWEST Atomic Number out of the following? (HINT - they are all listed in the Halogen column)Bromine (Br)Chlorine (Cl)Iodine (I)Astatine (At)
- 32. Multiple ChoiceWhich of the following elements is a Noble Gas?Lithium (Li)Argon (Ar)Boron (B)Bromine (Br)
- 33. Multiple ChoiceFluorine has an atomic number of 9. How many protons does it have?49120
- 34. Multiple ChoiceCarbon has 6 protons. Carbon has an atomic mass of 12. How many neutrons does Carbon have?12026
- 35. Multiple ChoiceCalcium has an atomic mass of 40 amu. Calcium has 20 protons. How many neutrons does Calcium have?4020015
- 36. Multiple ChoiceThe atomic number of Helium is 2. Helium has an atomic mass of 4. How many neutrons does Helium have?4812
- 37. Multiple ChoiceSulfur (atomic number = 16) has an atomic mass of 32. How many Protons and Neutrons does Sulfur have?P = 18, N = 14P = 16, N = 14P = 16, N = 16P = 30, N = 2
- 38. Multiple ChoiceWhich is the best definition of a molecule?Marshmallows that are stuck together.A mixture of different elements.Two or more atoms chemically bonded together.The smallest form of matter, consisting of protons, neutrons, and electrons.
- 39. Multiple ChoiceCO2 (Carbon Dioxide) is a compound. What 2 elements are found in this compound?Calcium, OxygenChlorine, OsmiumCarbon, OxygenSilicon, Osmium
- 40. Multiple Choice
What two elements are found in table salt (NaCl)?
Nitrogen and Carbon
Sodium and Chlorine
Hydrogen and Chlorine
Calcium and Nickel
- 41. Multiple Choice
The Law of Conservation of Matter
tells how many atoms of an element are contained in one molecule or formula unit.
the starting materials in a chemical reaction
the new substances that are formed in a chemical reaction
A law stating that atoms are not created or destroyed during a chemical reaction.
- 42. Multiple Choice
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
yes
no
- 43. Multiple Choice
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
- 44. Multiple Choice
The coefficient in 3H2O is
6
5
2
3
- 45. Multiple ChoiceHow many atoms of carbon (C) are in C6H12O6?361224
- 46. Multiple ChoiceHow many Sodium (Na) are in 6NaCl?1126
- 47. Multiple ChoiceHow many Hydrogen are in 4H2O?6824
- 48. Multiple ChoiceIs this equation balanced?yesnoNot enough information
- 49. Multiple Choice
How many Mn atoms are found in the following compound?
2MnO4
1
2
4
8
- 50. Multiple Choice
What is the little number after an element in a chemical equation called?
Example: H2
Coefficient
Atom
Subscript
Equation
- 51. Multiple Choice
How many elements are in C6H12O6?
1
2
3
4
- 52. Multiple Choice
Balance this equation:
H2 + Cl2 ---> HCl
It is balanced.
H2 + Cl2 ---> 2HCl
3H2 + Cl2 ---> 6HCl
H2 + 3Cl2 ---> 6HCl
- 53. Multiple Choice
Balance this equation:
HgO ---> 2Hg + O2
It is balanced.
2HgO ---> 2Hg + O2
2HgO ---> Hg + O2
HgO ---> Hg + 2O2
- 54. Multiple Choice
Complete the sentence.
During a chemical reaction, atoms ________.
can appear
can disappear
get rearranged
stop moving and vibrating
- 55. Multiple Choice
What is the Law of Conservation of Mass?
It states that matter cannot be created or destroyed.
It states that energy cannot be created or destroyed.
It states that matter can be created or destroyed.
It states that sound can be created or destroyed.
- 56. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 57. Multiple ChoiceWhat are the smaller numbers that you CANNOT change in a chemical equation?CoefficientProductsReactantsSubscript
- 58. Multiple Choice
Balance the following equation:
___ H2+ ___ O2→___ H2O
1, 1, 3
2, 2, 2
1, 2, 1
2,1, 2
- 59. Multiple ChoiceWhat coefficient should be used to make the following equation balanced?
N2+O2--> _NO1234 - 60. Multiple ChoiceHow many elements are in C6H12O6?1234
- 61. Multiple ChoiceElement or compound?
H2Oelementcompound - 62. Multiple ChoiceWhat is the total number of atoms present in 5Na3PO4540558
- 63. Multiple ChoiceIs the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2Oyesno - 64. Multiple ChoiceIs the following equation balanced?
4Fe + 3O2 --> 2Fe2O3yesno - 65. Multiple ChoiceIs the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2yesno - 66. Multiple ChoiceIs the following reaction balanced?
2CH3OH + 3O2 --> 2CO2 + 4H2Oyesno - 67. Multiple ChoiceHow many Oxygens are in this molecule?
(OH)24123 - 68. Multiple ChoiceIn balancing chemical equations, we changeCoefficientsSubscriptsBoth can be changedNone can be changed
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