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- 1. Multiple Choice
Which of the following substances is an element?
CO2
NaCl
H2
HCl
- 2. Multiple Choice
Two substances are mixed together. One dissolves in another and the temperature decreases. Which statement is true?
A chemical change occurred because one substance dissolved.
A physical change occurred because the temperature decreased.
A chemical change occurred because the temperature changed.
- 3. Multiple Choice
Rocks separate when soil is sifted.
Physical change
chemical change
- 4. Multiple Choice
Water boiling on the stove.
physical change
chemical change
- 5. Multiple Choice
Which is true?
Electrons are neutral
Electrons are negative
Neutrons are negative
Neutrons are positive
- 6. Multiple Choice
Which 2 subatomic particles have mass?
protons and electrons
neutrons and electrons
neutrons and protons
- 7. Multiple Choice
Which letter represents electrons?
w
x
y
z
- 8. Multiple Choice
Does this represent an element or compound?
element
compound
- 9. Multiple Choice
Does this represent an element or compound?
element
compound
- 10. Multiple Choice
How many electrons in Manganese?
25
30
55
56
- 11. Multiple Choice
Rusting
physical change
chemical change
- 12. Multiple Choice
Dissolving
physical change
chemical change
- 13. Multiple Choice
Marshmallows burning
physical change
chemical change
- 14. Multiple Choice
Creates a new substance
physical change
chemical change
- 15. Multiple Choice
Cannot be reversed
physical change
chemical change
- 16. Multiple Choice
How many neutrons in an atom of potassium?
19
20
39
59
- 17. Multiple Choice
A compound is made up of one type of atom that cannot be separated into smaller parts.
true
false
- 18. Multiple Choice
An element is made up of one type of atom that cannot separated into smaller parts.
true
false
- 19. Multiple Choice
Compounds consist of at least two or more elements chemically bonded together
True
False
- 20. Multiple ChoiceThe air is a _________.elementmixturecompoundenergy
- 21. Multiple ChoiceExamples are milk and gasoline.elementsmixturescompounds
- 22. Multiple Choice
Examples are diamonds (C) and Uranium (U)
elements
mixtures
compounds
- 23. Multiple ChoiceIs sugar (C12H22O11) an element or a compound?ElementCompound
- 24. Multiple ChoiceWhat is salad?elementcompoundmixture
- 25. Multiple Choice
An element is a ___ that cannot be separated into simpler substances by physical or chemical means.
pure substance
mixture
solution
compound
- Answer choicesTagsAnswer choicesTags