1st Quarter Chemistry Review

Which of the following is an example of a physical change?

•  Mixing baking soda and vinegar together, and this causes bubbles and foam.

• A glass cup falls from the counter and shatters on the ground.

• Lighting a piece of paper on fire and the paper burns up and leaves ashes.

• Lighting a piece of paper on fire and the paper burns up and leaves ashes.

Rank the states of matter from slowest to fastest particle speed. 

•  gas, solid, liquid 

•  gas, liquid, solid

•  solid, liquid, gas

• solid, gas, liquid

 _________ The order of elements in the periodic table is based on

• the number of protons in the nucleus.

• the electric charge of the nucleus. 

• the number of neutrons in the nucleus.

Which of the following is an example of a chemical change?

• illing up a balloon with hot air.

• Taking a glass of water and freezing it by placing it in the freezer.

• A plant collecting sunlight and turning it into food.

• Your dog ripping up your homework. 

 ________The smallest particles of an element is called a(n)

• Compound

• molecule

• Atom

__ The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet (complete outer energy level) of electrons, which makes the gas

• freeze at room temperature.

• unlikely to combine with other elements.

• B. react with other gases in the air.

  When you heat a sample of gas, what happens to the particles that make up the gas?

• The particles move faster

• B. react  The particles become more densewith other gases in the air.

• The particles get smaller    

 What has mass and takes up space?

• Weight 

• space

• mass

• matter

When two or more elements join together chemically,

• a compound is formed.

• a mixture is formed.

•   a substance that is the same as the elements is formed.

• the physical properties of the substances remain the same.

A property of an element that does not depend on the amount of the element is called a(n)

• electromagnetic property. 

•  characteristic property. 

• unique property.