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S3w7 Review homework

Last updated 3 months ago
15 questions
1

match the vocabulary with their definitions

Draggable itemCorresponding Item
atom
an organized chart of all known elements, arranged by their properties and atomic structure
bond
the smallest particle of an element that maintains all properties of that element
element
two or more atoms bonded together
molecule
A substance made of one type of molecule, where that molecule is made up of two or more different types of atoms
atomic number
forces that hold atoms together in molecules
Chemical symbols
a pure substance made up of only one type of atom
periodic table
the number of protons in an atom's nucleus, which determines what element it is
compound
the one to two letter abbreviation for an element
1

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?

Required
6

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
1

Categorize the behaviors of different mixtures

  • particles in the liquid do not scatter light
  • particles in the liquid are mixed at a molecular level. Single molecules or atoms are between molecules of the liquid
  • Particles in liquid won't settle, but the mixture is still heterogeneous
  • particles in the liquid are too small to be filtered but large enough to scatter light
  • Particles in the liquid can be filtered out
  • particles in the liquid will settle over time
  • Suspension
  • Solution
  • colloid
1

Categorize the types of mixtures

  • muddy water
  • glue
  • milk
  • salt water
  • OIl and vinegar salad dressing
  • sugar water
  • Suspension
  • Solution
  • colloid
1

match the vocab word to a definition

Draggable itemCorresponding Item
concentration
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.
Supersaturation
The fluid that will dissolve a substance (the water in salt water)
unsaturated
the substance being dissolved (the salt in salt water)
Solvent
how much solute is in the solution per unit of solvent
Saturated
when a solvent is holding the maximum amount of solute
Solution
When a solution has been heated, brought to saturation, and then allowed to cool without the solute coming out of solution.
precipitate
solute that comes out of solution
solute
a solution that can dissolve more solute
Required
1

Which best describes a chemical change?

Required
1

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
1

During an ionic bond _____________ are gained and lost.

1

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

1

When a molecule is polar , which is true?

1

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

Draggable itemCorresponding Item
ionic bonds
protons and neutrons
covalent bonds
bonds between atoms because they have different charge. these form some molecules
nuclear bond
bonds between atoms because they are sharing electrons. these form some molecules
hydrogen bonds
bonds between different molecules, one frequently being water
1

What keeps two strands of amylose together?

1

What breaks those molecules apart?

1

What bonds them back together?