Chemistry Chapter 1-2 Test

Helium which is put in balloons is less dense than air

If you observed the colors of flowers in a garden, that is an example of

What type of physical change would you use to separate the components of an aqueous sugar solution?

Cooking eggs and baking bread are examples of

Which electromagnetic wave has a higher frequency than visible light? (Use Image)

An atom of iron (Fe) contains 26 electrons. How many energy levels are need to contain these electrons? (Use Image)

If a group of compounds weighing a total of 57 g react, the product will weigh

An atom's valence electrons are those in its ____________

Vinegar reacts with baking soda. This is an example of a

If you are tasting candy and you describe it as being sour. This is an example of

If a piece of cork and a piece of yellow pine wood are dropped into water, what will happen?

Aspirin and sucrose are both examples of ___________

Blue ink is an example of

Chicken noodle soup is an example of a

This element has one valence electrons (Use Image or very back of the Chemistry Book)

Yeast acts on sugar to form carbon dioxide and ethanol. This is an example of a

Why were so few alpha particles strongly deflected in Rutherford's experiment?

Mrs. Haas' favorite beverage with popcorn is Mexican Coke, Mexican coke is a

Can only be separated by chemical means

The sugar in sweet tea is called the

When 0.243 g of magnesium reacts with 0.160 of oxygen, how many grams of magnesium oxide is produced (hint: add!)

An object has a mass of 20.0 g and a volume of 10.0 mL. What is its density

A magnesium atom has________ valence electrons (Use Image)

In natural waste-disposal processes, atoms are ______

Ammonia is a gas at room temperature. This is an example of a

Alloys are homogeneous mixtures of

When water decomposes into hydrogen and oxygen, the mass

If it is hot outside and you begin to sweat, what kind of reaction is perspiring?

The number of protons in the nucleus of the atoms of an element determines the element's ________

Diamonds are capable of cutting glass. This is an example of a

Which one(s) have a mass of 1 amu?

In a Lewis dot diagram of Carbon, there would be _____ dots around "C" (Use Image if needed)

If a scientist studies a beam of particles, and those particles are attracted to a negatively changed plate, they are

When an atom absorbs energy that causes one of its electrons to move to a higher energy level, the atom is said to be in

The atomic number of an element, whose atoms have 10 protons and 11 neutrons is ___

This element is in a period (row) two of the periodic table and has two dots in its Lewis dot diagram (use image)

The scientific statement that says that compounds always have exactly the same composition by mass is the_________

Freezing water is an example of

These two particles are found in atomic nuclei

The mass number of an element whose atoms have 15 protons and 16 neutrons is ____

Chapter 2: Thomson's model of the atom included negative ____ embedded in a ball of ____ charge

A volatile substance is one that ___________ at room temperature.

Greek philosophers thought these four element formed all matter

What electromagnetic waves have a longer wavelength than visible light? (Use Image)

Chapter 1: The measure of the amount of matter that an object contains is its

Which is a chemical property of iron

The only subatomic particle that does not carry an electric charge is the _____

Lodine-131 and iodine-127 are examples of________

Using hand warmers on a cold day is an example of

The electrons around an atom form an ___________

If a student ran 15 miles, that is an example of

How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?

A candle burning is an example of a

The nucleus of this atom contains nine protons and nine neutrons. (Use Image)

The flavoring and sugar in soda is the ____ of the solution