Density
What is the formula and unit for finding Density?
D=mass/volume
unit: g/ml
What are the two categories of Matter?
Mixtures and Pure Substances
A material that can be hit without shattering is
Malleable
1st to discover sub-atomic particles, called his model the plum pudding model
Thomson
If an atom of Germanium has a mass number of 70 and an atomic number of 32, how many neutrons are in its nucleus?
38 neutrons
What is the mass of grape soda that fills a 50 mL container? The density of the soda is 0.5 g/mL.
25g
If an unknown substance CANNOT be broken down into simpler substances, it is
An Element
Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke. Identify the type of change
Chemical Change
He suggested that all matter is made of individual particles called atoms that can not be divided.
Dalton
What is the maximum electrons each shell can hold(level 1-4)
Level 1: 2
Level 2: 8
Level 3: 18
Level 4: 32
A box of Chex-mix has a mass of 25 g. The dimensions of the box is 11.5 cm x 8.5 cm x 2.5 cm. What is the density of the box of Chex-mix?
0.10g/ml
You are about to open a container of soy milk but notice that there are instructions to "shake well before serving". The soy milk is most likely a
Suspension
name 1 thing we discussed that has the highest viscosity?
Honey/corn syrup
The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?
Atom
If Neon have 8 valence electrons will it gain or lose electrons to become stable and what would be the charge?
Neither and no charge
What do you do when you have more than one mL(volume) in a problem?
Subtract the bigger mL from the smaller mL
If a material contains three elements joined in a fixed proportion, it is a(an)
A compound
Filtration can be used to separate mixtures based on
the size of their particles
Is known for his famous gold foil experiment and proved the existence of the nucleus
Rutherford
If Aluminum have 3 valence electrons how many electrons will it have to gain or lose electrons to become stable and what would be the charge?
lose 3, (+3 charge)
What must happen when you have multiple cm in a problem?
Multiply all the cm together to covert it to mL
2 reasons why Water is a compound
1) can be broken down into simpler substances
2) always has two hydrogen atoms for each oxygen atom
Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.
Physical, Chemical
Niels Bohr was a Danish physicist. He proposed a model of the atom that is similar to the
model of
The solar system
If Oxygen have 6 valence electrons how many electrons will it have to gain or lose electrons to become stable and what would be the charge?
Gain 2, (-2) charge