Introduction to Compounds, Molecules and Balancing Equations

Multiple Choice

True or False: Abiotic factors depend on chemistry of life.

• True

• False

Multiple Choice

What occurs when a liquid becomes a solid?

• Freezing

• Melting

Multiple Choice

What state of matter has its own shape and a definite volume?

• Solid

• Liquid

• Gas

Multiple Choice

What state of matter takes the shape of its container and doesn't have a definite volume?

• Solid

• Liquid

• Gas

Multiple Choice

The state of matter where particles are very spread out and moving quickly.

• gas

• liquid

• solid

• Helium

Multiple Choice

Matter is anything that has mass and ....

• weight

• volume

• movement

• temperature

Multiple Choice

When one or more substances are changed into a new substance with different properties.

• density

• physical change

• chemical change

• law of conservation of mass

• plasma

Multiple Choice

A _________ property is a characteristic of matter that can be observed or measured without changing the substance.

• solid

• liquid

• gas

• physical

• chemical

Multiple Choice

Provided is a list of five different substances.

NaOH     Cu    H2O     N2    H2

How many of these substances are elements?

• 2

• 3

• 4

• 5

Multiple Choice

Which of the following is a homogeneous mixture?

• sand in a bottle

• lemonade

• Mercury

• salad

Multiple Choice

An element is a ___ that cannot be separated into simpler substances by physical or chemical means.

• pure substance

• mixture

• solution

• compound

Multiple Choice

If my charge becomes 2+ what does that say about me?

• I am stealing 2 electrons
• I am losing 2 electrons
• I am in period 2
• I have an atomic # of 2

Multiple Choice

If I gain electrons I become

• Positive because I've added to my atom
• negative because I've added electrons
• same because i'm balanced
• equal because now I have electrons

Multiple Choice

True or False: An atom is only "happy" when the inner shell is full.

• True

• False

Multiple Choice

How many electrons can be in the 2nd energy level hold?

• 1

• 2

• 4

• 8

Multiple Choice

How many Oxygens are in this molecule? 
(OH)₂

• 4
• 1
• 2
• 3

Multiple Choice

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Multiple Choice

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Multiple Choice

How many water molecules do you need to balance the equation: __H20 --> 2H2 + O2?

• 1

• 2

• 3

• 0