Chemistry Review

Which of the following is not an example of a physical change?

• sanding a piece of wood

• the explosion of fireworks

• shaping a gold bar

• melting a popsicle

Balance the equation. What is the correct number that should be in front of the H2 molecule?

• 1

• 2

• 3

• 4

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The ability to be bent is also known as

• physical change

• malleability

• solubility

• conductivity

What distinguishes one atom of an element to another?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of protons and electrons

How many protons does Copper have?

• 63.546

• 29

• 42

• 247

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How is the periodic table set up?

• Elements are placed in the order that they were discovered in.

• Elements are placed in alphabetical order, creating a pattern.

• Elements are placed randomly in a table, to make even number of columns and rows.

• Elements are placed according to various characteristics they have, creating patterns.

Who created the Periodic Table that we know of today?

• Dmitri Medelev

• Bohr

• Charles Darwin

• Bill Nye

How many electrons can fit in the first electron shell (closest to the nucleus)

• 8

• 2

• 18

• 33

What is the Law of Conservation of Mass?

• Mass cannot be created or destroyed

• Energy cannot be created or destroyed

• Mass can be destroyed and created again

• Every action has an equal and opposite reaction.

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Which of these are a chemical property? Check all that apply.

• Color Change

• Gas Creation

• Melting

• Precipitate Formation

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