Unit 7.1 Assessment

The three states of matter are:

• solid, gas, energy
• gas, liquid, solid
• plasma, liquid, energy

How many atoms of sodium are in this molecule?

• 3
• 2
• 6
• 1

If a substance is less dense than water it will...

• float
• sink
• combine with water

When electricity was ran through water, what gasses were released?

• water vapor and oxygen
• hydrogen and sodium
• oxygen and hydrogen
• water vapor and hydrogen

What is this in molecular formula?

• 3H₂O
• H3O3
• 3O6H

Matter cannot be _____ or ______.

• created, destroyed
• changed, destroyed
• energy, changed
• flipped, flopped

Which model of matter is most likely a liquid?

• A
• B
• C

The substances at the beginning of a chemical equation (to the left of the arrow) are called the ____

• product
• yield
• chemical symbol
• reactants

Does the equation follow the Law of Conservation of Mass?

• Yes, atoms are equal on both reactants and products
• No, because hydrogens aren't equal on both sides.
• No, because ONLY carbon isn't equal on both sides.
• No, because carbon and oxygen are not equal on both sides.

All of the of the following are properties of substance except

• Color

• Density

• Odor

• Energy