Chemistry Final 1

What is the correct Lewis electron-dot structure for the compound magnesium fluoride?

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What is a physical change?

• A change in the chemical composition of a substance.

• A change in color.

• A change in state or form without altering the substance's chemical identity.

• A change in taste.

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

• Burning wood.

• Rusting of iron.

• Evaporation of water.

• Digestion of food.

What happens to the chemical composition during a physical change?

• It remains the same.

• It becomes more complex.

• It always forms a new substance.

• It breaks down into simpler compounds.

Which of the following is not typically associated with a physical change?

• Change in color.

• Change in state.

• Change in taste.

• Change in volume.

What is an example of a physical change involving a change in state?

• Digestion of food.

• Burning of paper.

• Melting of ice.

• Reaction of an acid with a base.

What defines a chemical change?

• A change in state or form without altering the substance's chemical identity.

• A change in color.

• A change in taste.

• A change in chemical composition.

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

• Boiling water.

• Burning wood.

• Dissolving sugar in water.

• Cutting paper.

What is a characteristic of chemical changes?

• They are easily reversible.

• They often involve a change in state.

• They do not involve the formation of new substances.

• They may release or absorb energy.

What typically happens to the chemical composition during a chemical change?

• It remains the same.

• It becomes more complex.

• It always forms a new substance.

• 1. It breaks down into simpler compounds.