Chemistry Midterm

Safety + Scientific Method

100

The variable that we measure is the 

dependent variable

200

When the hypothesis and conclusion consistently agree over multiple experiments, we can say that we have a BLANK. 

theory. 

300

What does PASS stand for with fire extinguishers?

Pull, Aim, Squeeze, and Sweep 

400

What's the main purpose of the emergency shower?

To quickly wash off chemicals

500

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.

600

Why do we need to use a control or standard in an experiment?

So that we have a reference to compare our data to. 

Density

100

What's the equation for density?

Mass / Volume or M / V

200

What are the two possible units for density that we use in this class?

g / mL or g / cm³

300

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

400

Lava sinks in water. That tells us that the density of the lava is ___ than the density of the water. 

greater

500

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

600

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

Matter Classification

100

A snack mix is an example of this type of mixture.

heterogenous mixture

200

What's an example of a homogeneous mixture?

Steel, blood, vinegar, air, cement, glue, unopened soda, etc. 

300

This type of mixture looks uniform throughout.

Homogeneous mixture

400

All matter has BLANK and BLANK. 

Mass and Volume

500

This is what we call a chemical made of more than one type of element / atom.

A compound.

600

What type of a mixture would lava be?

Heterogeneous because it's chunky 

Atomic Structure + Properties

100

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. 

200

Which element is in period 6 and group 6?

W or Tungsten

300

Color, Texture, Conductivity, Malleability, and Odor are all ____

Physical Properties

400

Groups are organized by ____

similar chemical and physical properties.

500

Periods are organized by 

increasing atomic number / increasing number of protons

600

If I hit a shiny solid element with a hammer and it shatters, what type of element was it most likely?

A metalloid.