1.label the substances as either elements or compounds. fe 2 ________________ k________________...
TRANSCRIPT
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CHEMISTRY REVIEW
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1. Label the substances as either elements or compounds.
Fe2 ________________
K ________________NaCl ________________NaCO3 ________________
He ________________H2O ________________
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2. The word pure refers to what?
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3. Write a chemical symbol with two letters correctly.
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4. Write a compound correctly. (It can be made up)
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5. An ounce of copper can be spun into wires. What term is used to describe this physical property of
copper?
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6. Which column indicates only a chemical change?
1 2 3 4
Silver tarnishes Ice melting Chalk fizzing Burning wood
Bike rusting Paper tearing Sugar dissolving Cutting wood
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7. Which substance best represents a compound?
1 Made of one type of matter
2 Will not separate easily
3 Separated easily
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8. Jerry was investigating a mystery substance. He observed the substance was shiny in luster, he could hit the substance
and it did not break, and lit up a bulb when connected to a battery. The substance is
most likely a what?
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9. Nine grams of a green solid is added to 20 grams of water at 12⁰C. Which observation best indicates that a chemical reaction occurred in the solution?
A. The total mass of the solution was 29 grams
B. The substance was greenC. The temperature increased from 12⁰C to
32⁰C
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10. What is the difference between Oxygen and Glucose?
Glucose C6H12O6
Sodium Chloride NaCl
Oxygen O2
Hydrochloric Acid HCl
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11. Which substances are elements?
1 Ca2 H2SO4
3 rb4 H2O5 K6 HOP
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12. Three substances are mixed with a clear liquid. Which mixture most likely reacted chemically?
Substance Before mixing Mixture
1 Amber liquid Pale amber liquid
2 Clear liquid Green liquid
3 Red crystals Red liquid
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13. How many sulfur atoms are in the formula Na2SO4?
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14. List 3 examples of evidence of NOT a chemical change.
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15. Which substance is most likely a metalloid?
Substance Luster Malleability/ Ductility
Conductivity
1 None No Insulator
2 High Yes Conductor
3 High No Semi-conductor
4 Low No Insulator
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16. A pure substance that cannot be broken down is called what?
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17. Which mystery substance is a nonmetal?
1 Dull, yellow, powdery solid, smells like eggs, brittle
2 Silvery-gray, solid, shaped into a bar, malleable
3 Reddish-brown, shiny solid, shaped into a wire, can be stretched, malleable
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18. Tina combined two liquids in the lab. In which experiment did a chemical change NOT take place?
1 The liquids changed from clear to dark green
2 One liquid settled to the bottom
3 Bubbles formed
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19. What is the difference in grams between the total mass of the liquids and the total mass of the solids?
Water 125
Toothpicks 5
Marbles 40
Oil 75
Sugar cubes 20
Alcohol 98
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20. How many atoms of each element are in the following compound?
CaCO3
Ca _________
C __________
O __________
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21. Which section holds the nonmetals?
2
1
3