Exploring Atoms, Elements, and Compounds

What is the primary focus of chemistry?

• Study of matter and its changes

• Study of human behavior

• Study of living organisms

• Study of celestial bodies

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Which branch of chemistry deals with carbon-containing compounds?

• Inorganic Chemistry

• Analytical Chemistry

• Organic Chemistry

• Nuclear Chemistry

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What is matter?

• Anything that is solid

• Anything that is living

• Anything that can be seen

• Anything that has mass and volume

Which of the following is NOT considered matter?

• Salt

• Energy

• Air

• Water

Who proposed that all matter is made up of four classical elements?

• Aristotle

• Plato

• Democritus

• Empedocles

What did Democritus call the tiny particles that make up matter?

• Compounds

• Molecules

• Atoms

• Elements

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What is the smallest unit of ordinary matter that has the properties of a chemical element?

• Molecule

• Compound

• Atom

• Electron

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How many known elements are there on the periodic table?

• 90

• 150

• 115

• 200

What is a compound?

• A single element

• A mixture of gases

• Two or more different elements bonded together

• A type of molecule

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What is formed when sodium and chlorine bond together?

• Water

• Hydrogen chloride

• Sodium chloride

• Sodium hydroxide

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