Chemistry TEST atom theory, matter, class, C&P prop

Imagine you're a time-traveling scientist, and you've just landed in the lab of Ernst Rutherford. He's about to make a groundbreaking discovery about the atom using gold foil. Can you guess what part of the atom he discovered?

• Proton

• Neutron

• Electron

• Orbitals

Let's take a trip back in time! J.J. Thomson made a groundbreaking discovery about atoms. Can you guess what it was?

• He proved that atoms are the tiniest particles of matter

• He discovered that atoms contain little negatively charged particles

• He found out that atoms have an overall negative charge

• He revealed that atoms have an overall positive charge

Organize these options into the right categories

Groups:

(a) Pure substance-element

,

(b) Pure substance-compound

,

(c) Homogeneous mixture

,

(d) heterogeneous mixture

• sandwich

• salsa

• Iron

• vegetable oil

• carbon monoxide

• sodium

• beach sand

• hydrogen

• Dr. Pepper

• vinegar

• aluminum

• concrete

• salt

• steam

How would you describe a homogeneous mixture?

Imagine you're a scientist! You notice a change in a substance, but the substance itself remains the same. What would you call this?

• A Chemical Change

• A Physical Change

Imagine you're a scientist, and you've got two sets of properties in front of you: intensive and extensive. Can you tell which one is influenced by the size of a sample you're examining?

• intensive

• extensive

Organize these options into the right categories

Groups:

(a) chemical property

,

(b) physical property-extensive

,

(c) physical property-intensive

• toxicity

• flammability

• length

• weight

• mass

• luster

• reactivity

• heat of combusion

• oxidation states

• hardness

• volume

• boiling point

• color

Which of the following are chemical changes? ​ (a)   ​ (b)   ​ ​ (c)   ​ ​ ​ (d)  

• iron rusting
• wood burning
• digestion
• crushing a can

• glaciers melting

• mixing sand with water

• baking cookies

Which of the following are physical changes? ​ ​ (a)   ​ (b)   ​ (c)   ​ (d)  

• rotting banana

• cutting a foldable
• dissolving Kool-Aid in water
• breaking a mirror
• sublimation of dry ice
• fireworks

• Coke & mentos

Phase changes are __ changes.