S3w7 Review homework

1

match the vocabulary with their definitions

Stavka koja se može prevući		Odgovarajuća stavka
atomic number		an organized chart of all known elements, arranged by their properties and atomic structure
molecule		the smallest particle of an element that maintains all properties of that element
Chemical symbols		two or more atoms bonded together
periodic table		A substance made of one type of molecule, where that molecule is made up of two or more different types of atoms
compound		forces that hold atoms together in molecules
atom		a pure substance made up of only one type of atom
element		the number of protons in an atom's nucleus, which determines what element it is
bond		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?

Obavezno

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 will settle over time
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 do not 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

1

Categorize the types of mixtures

salt water
milk
glue
muddy water
sugar water
OIl and vinegar salad dressing

Suspension
Solution
colloid

1

match the vocab word to a definition

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

Obavezno

1

Which best describes a chemical change?

Change in size only

Formation of a new susbtance

Temporary change

Only change in color

6.6.E

7.6.C

Obavezno

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.

Protons

Electrons

Neutrinos

Valence Electrons

1

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

Compound

Nonpolar

Polar

Chemical equation

1

When a molecule is polar , which is true?

the molecule is water

the molecule is hydrogen bonded

the molecule is held together by shared electrons, but the electrons aren't dispersed equally around the molecule. Part of the molecule is positive, and another part is negative.

the molecule is a compound.

1

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

Stavka koja se može prevući		Odgovarajuća stavka
covalent bonds		protons and neutrons
hydrogen bonds		bonds between atoms because they have different charge. these form some molecules
ionic bonds		bonds between atoms because they are sharing electrons. these form some molecules
nuclear bond		bonds between different molecules, one frequently being water

1

What keeps two strands of amylose together?

ionic bonds

covalent bonds

hydrogen bonds

1

What breaks those molecules apart?

heat, and then water getting in between

nothing they are bonded for life

stirring

starches

1

What bonds them back together?

nothing, they hate each other now

hydrogen bonds with. the water between the starch molecules

heat makes them slow down

stirring makes them want to stay still

S3w7 Review homework

match the vocabulary with their definitions

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?

Sort the following as either an ELEMENT or a COMPOUND

Categorize the behaviors of different mixtures

Categorize the types of mixtures

match the vocab word to a definition

Which best describes a chemical change?

Classify these actions as primarily physical change, chemical change.

During an ionic bond _____________ are gained and lost.

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

When a molecule is polar , which is true?

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

What keeps two strands of amylose together?

What breaks those molecules apart?

What bonds them back together?

match the vocabulary with their definitions

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?

Sort the following as either an ELEMENT or a COMPOUND

Categorize the behaviors of different mixtures

Categorize the types of mixtures

match the vocab word to a definition

Which best describes a chemical change?

Classify these actions as primarily physical change, chemical change.

During an ionic bond _____________ are gained and lost.

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

When a molecule is polar , which is true?

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

What keeps two strands of amylose together?

What breaks those molecules apart?

What bonds them back together?

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?

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?