Atoms/Periodic Table
pH, Acids and Bases
Pure Substances and Mixtures
Chemical Properties
The Universe
100

Atoms are the smallest unit of what?

Matter

100

A pH of neutral is what number?

7

100

Define homogeneous mixture.

"looks the same"

"evenly mixed"

"no chunks"

100

How can you tell a chemical change has taken place?

Something new  is made 

(different from the starting material)

100

Name three objects that are part of our solar system.

planets, dwarf planets, meteors, comets, moons

100

Name the three parts to an atom and their charges.

Proton, positive.

Neutron, neutral.

Electron, negative.

100

Acids become stronger closer to number...

0

100

What kind of mixture is this?

Heterogeneous 

100

Give an example of a physical change.

(anything when nothing new is made. a phase change, etc.)

100

What keeps everything in a solar system together?

The force of gravity from the star. 

(90% of the mass)

200

How many protons are in this element?

16

200

Bases AND acids become WEAKER closer to number...

7

200

What is saturation?

The solvent cannot dissolve any more solute.

200

Name three ways you can increase the speed (rate) of a chemical reaction?

Heat, Smaller container, Catalyst, Break-up chunks

200

What is a solar system?

A star and anything that orbits it.

200

What is the name of the number on top?

Atomic Number

200

Between an acid and a base, which feels slippery to the touch?

Bases

200

Can a pure substance be a compound molecule?

Yes

(salt = NaCl)

200

What does the Law of Conservation of Mass state? 

Matter cannot be created or destroyed.

200

What is the name of the group of objects at the very edge of our solar system?

Oort Cloud

300

Why are elements put into families together?

They have similar properties.

(metals are shiny, non-metals are brittle, metalloids in between)

300

When an acid and a base are mixed, what two things are produced?

Water and a salt.

300

What can you do to a mixture that cannot be done to a pure substance?

Separate the parts (the solute and the solvent)

300

How do you create new compounds/substances with individual atoms?

Can only rearrange them.

300

What must an object do to its orbit (path) in order to be considered a planet?

Clear it of debris (smaller objects)