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S3w7 Review homework

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Last updated 5 months ago
15 questions
1
1
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6
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Question 1
1.

match the vocabulary with their definitions

Draggable itemarrow_right_altCorresponding Item
atom
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an organized chart of all known elements, arranged by their properties and atomic structure
bond
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the smallest particle of an element that maintains all properties of that element
compound
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two or more atoms bonded together
molecule
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A substance made of one type of molecule, where that molecule is made up of two or more different types of atoms
periodic table
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forces that hold atoms together in molecules
Chemical symbols
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a pure substance made up of only one type of atom
atomic number
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the number of protons in an atom's nucleus, which determines what element it is
element
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the one to two letter abbreviation for an element
Question 2
2.

Sometimes you will see a number in front of a chemical formula. Like this -

that just tells me you have three of the same kind of molecule. If I have 3Fe_2O_3, how many oxygen atoms do I have total?

Question 3
3.

Sort the following as either an ELEMENT or a COMPOUND

  • Oxygen =O_2
  • Water = H_2O
  • Gold = Au
  • Sugar = C_{12}H_{22}O_{11}
  • ELEMENTS
  • COMPOUNDS
Question 4
4.

Categorize the behaviors of different mixtures

  • Particles in liquid won't settle, but the mixture is still heterogeneous
  • particles in the liquid do not scatter light
  • Particles in the liquid can be filtered out
  • particles in the liquid will settle over time
  • particles in the liquid are too small to be filtered but large enough to scatter light
  • particles in the liquid are mixed at a molecular level. Single molecules or atoms are between molecules of the liquid
  • Suspension
  • Solution
  • colloid
Question 5
5.

Categorize the types of mixtures

  • muddy water
  • salt water
  • sugar water
  • glue
  • milk
  • OIl and vinegar salad dressing
  • Suspension
  • Solution
  • colloid
Question 6
6.

match the vocab word to a definition

Draggable itemarrow_right_altCorresponding Item
Solution
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a homogenous mixture where one substance is mixed with another at a molecular level. The mixture doesn't settle over time, it cannot be filtered out, and it does not scatter light.
Saturated
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The fluid that will dissolve a substance (the water in salt water)
solute
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the substance being dissolved (the salt in salt water)
concentration
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how much solute is in the solution per unit of solvent
Supersaturation
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when a solvent is holding the maximum amount of solute
Solvent
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When a solution has been heated, brought to saturation, and then allowed to cool without the solute coming out of solution.
precipitate
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solute that comes out of solution
unsaturated
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a solution that can dissolve more solute
Question 7
7.

Which best describes a chemical change?

Question 8
8.

Classify these actions as primarily physical change, chemical change.

  • Burning wood
  • Rusting iron
  • Dissolving sugar
  • Melting ice
  • cutting paper
  • baking a cake
  • glass blowing
  • fermenting grapes
  • Chemical Change
  • Physical Change
Question 9
9.

During an ionic bond _____________ are gained and lost.

Question 10
10.

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons.

Question 11
11.

When a molecule is polar , which is true?

Question 12
12.

quick review - match the type of bond to what is being bonded

Draggable itemarrow_right_altCorresponding Item
nuclear bond
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protons and neutrons
covalent bonds
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bonds between atoms because they have different charge. these form some molecules
hydrogen bonds
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bonds between atoms because they are sharing electrons. these form some molecules
ionic bonds
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bonds between different molecules, one frequently being water
Question 13
13.

What keeps two strands of amylose together?

Question 14
14.

What breaks those molecules apart?

Question 15
15.

What bonds them back together?