Safety + Scientific Method
The variable that we measure is the
dependent variable
What's the equation for density?
Mass / Volume or M / V
A snack mix is an example of this type of mixture.
heterogenous mixture
What is the atomic mass of an isotope with an atomic number of 5, 5 protons, 5 neutrons, and 5 electrons?
15 amu. Atomic number and # of protons are the same thing.
theory.
What are the two possible units for density that we use in this class?
g / mL or g / cm3
What's an example of a homogeneous mixture?
Steel, blood, vinegar, air, cement, glue, unopened soda, etc.
Which element is in period 6 and group 6?
W or Tungsten
What does PASS stand for with fire extinguishers?
Pull, Aim, Squeeze, and Sweep
What's the density of an object with a mass of 12 g and a volume of 12 mL? Include units in your answer.
1 g / mL
This type of mixture looks uniform throughout.
Homogeneous mixture
Color, Texture, Conductivity, Malleability, and Odor are all ____
Physical Properties
What's the main purpose of the emergency shower?
To quickly wash off chemicals
Lava sinks in water. That tells us that the density of the lava is ___ than the density of the water.
greater
All matter has BLANK and BLANK.
Mass and Volume
similar chemical and physical properties.
Why should you not use the emergency shower if you are on fire?
You could start more fires as you try to get to the shower.
What's the volume of a substance that has a density of 12 g / mL and a mass of 12 g? Include units in your answer.
1 mL
This is what we call a chemical made of more than one type of element / atom.
A compound.
Periods are organized by
increasing atomic number / increasing number of protons
Why do we need to use a control or standard in an experiment?
So that we have a reference to compare our data to.
What's the mass of a substance with a density of 12 g / mL and a volume of 12 mL. Include units in your answer.
144 g
What type of a mixture would lava be?
Heterogeneous because it's chunky
If I hit a shiny solid element with a hammer and it shatters, what type of element was it most likely?
A metalloid.