CH 4: WorksheetName: KEY

CHM 1025

  1. List the three states of matter
  1. Solid
  1. Liquid
  1. Gas
  1. Label the state of matter described in the following
  2. Has a fixed shape, has a fixed volume, not compressible, has particles with the lowest kinetic energy, particles with the most restricted movement

Solid

  1. Does not have a fixed shape or volume, is compressible, has particles with the highest kinetic energy, particles can move freely

Gas

  1. Does not have a fixed shape but does have a fixed volume, not compressible, has particles that are closely packed but are free to move

Liquid

  1. Which of the following is:
  2. A solid 1
  1. A gas 3
  1. A liquid 2

1 2 3

  1. Label the type of physical change in the following and tell me if the kinetic energy of the particles is increasing or decreasing

Type  or 

  1. Solid  Gassublimation
  1. Solid  Liquidmelting
  1. Liquid  Solidfreezing
  1. Liquid  Gasvaporization
  1. Gas  Soliddeposition
  1. Gas  Liquidcondensation
  1. Write brief definitions for the following:
  2. MixtureComposed of more than 1 substance and can be physically separated into its component substances
  1. Heterogeneous mixtureMatter with indefinite composition and variable properties
  1. Homogeneous mixtureMatter with definite composition, with constant properties for 1 sample, but variable properties from sample to sample
  1. Pure substanceMatter with definite composition and constant properties (elements & compounds)
  1. CompoundPure substance that can be broken down into 2 or more simpler substances by a chemical reaction
  1. ElementPure substance that can’t be broken down by ordinary chemical reaction
  1. Label the following, heterogeneous mixture, homogeneous mixture, element or compound
  1. AirHomo
  1. CopperElement
  1. Bronze alloyHomo
  1. SaltwaterHomo
  1. Carbon dioxideCmpd
  1. What is the most abundant element on earth?oxygen
  1. What is the most abundant element in the human body?oxygen
  1. Write the chemical symbol for the following and label metal, non-metal, or semi-metal and label elemental state in normal conditions

Chemical Name / Chemical Symbol / Metal, non-metal, or semi-metal / Solid, liquid, or gas at 25C & 1 atm
Hydrogen / H / Non-metal / Gas
Silicon / Si / Semi-metal / Solid
Mercury / Hg / Metal / Liquid
Carbon / C / Non-metal / Solid
Terbium / Tb / Metal / Solid
Nitrogen / N / Non-metal / Gas
Sulfur / S / Non-metal / Solid
Oxygen / O / Non-metal / Gas
Zinc / Zn / Metal / Solid
Chromium / Cr / Metal / Solid
Lead / Pb / Metal / Solid
Iron / Fe / Metal / Solid
Argon / Ar / Non-metal / Gas
Manganese / Mn / Metal / Solid
Molybdenum / Mo / Metal / Solid
Sodium / Na / Metal / Solid
Iodine / I / Non-metal / Solid
Potassium / K / Metal / Solid
Bromine / Br / Non-metal / Liquid
Boron / B / Semi-metal / Solid
Uranium / U / Metal / Solid
  1. Write brief definitions for the following:
  1. Chemical formulaAn abbreviation for the name of a chemical compound that indicates the # and type of atoms in it
  1. MoleculeA particle composed of 2 or more non-metals
  1. Law of definite compositionCompounds always contain the same elements in a constant proportion by mass
  1. State the total number of each type of atom in the following
  2. C6H12O6
  3. C = 6
  4. H =12
  5. O =6
  6. CH3NH2
  7. C =1
  8. H =5
  9. N =1
  10. CH3(CH2)5CH3
  11. C =7
  12. H =16
  13. Fe(OH)3
  14. Fe =1
  15. O =3
  16. H =3
  17. C6H5NH2
  18. C =6
  19. H =7
  20. N =1
  21. Na2SO4
  22. Na =2
  23. S =1
  24. O =4
  1. Write brief definitions for the following:
  1. Physical propertyCharacteristic of a pure substance that we can observe without changing it’s composition
  1. Chemical propertyDescribes the chemical reactions of a pure substance
  1. Physical changeA change where the chemical composition is not changed
  1. Chemical changeA chemical reaction
  1. Label the following physical or chemical properties
  1. Boiling pointPhysical
  1. Reacts with oxygenChemical
  1. DensityPhysical
  1. Unreactive in acidChemical
  1. ColorPhysical
  1. Label the following physical or chemical changes
  1. DissolvingPhysical
  1. RustingChemical
  1. BurningChemical
  1. FreezingPhysical
  1. Write brief definitions for the following:
  1. EnergyAbility to do work
  1. Potential energyStored energy based on position or composition
  1. Kinetic energyEnergy of motion
  1. Name the six forms of energy
  1. Heat
  2. Light
  3. Chemical
  4. Electrical
  5. Mechanical
  6. Nuclear

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