ChR: Atomic Zoom-In: Questions

What did John Dalton propose in the 1800s?

• The atomic theory

• The theory of relativity

• The discovery of electricity

• The concept of chemical formulas

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How many different types of atoms are currently known in the universe?

• 50

• 90

• 118

• 150

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What is ethyl butyrate?

• A human-made material

• A substance found in many fruits

• A naturally occurring substance in sweat

• A type of extended structure

What is the chemical formula for ethyl butyrate?

• C5H10O2

• C6H12O2

• ZrO2

• C

Why might chemists add ethyl butyrate to packaged orange juice?

• To increase its acidity

• To preserve the juice

• To enhance the orange scent and flavor

• To reduce spoilage

What is the primary difference between diamonds and cubic zirconia?

• Diamonds are made of carbon atoms, while cubic zirconia is made of zirconium and oxygen atoms.

• Diamonds are less expensive than cubic zirconia.

• Cubic zirconia is the hardest naturally occurring substance.

• Diamonds are not used in jewelry.

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How do ethyl butyrate and Isovaleric acid differ at the atomic scale?

• Isovaleric acid has one fewer carbon atom and 2 fewer hydrogen atoms.

• Ethyl butyrate has a higher melting point.

• Both substances have the same chemical formula.

• Isovaleric acid has a pleasant citrus smell.

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What is the significance of the repeating atom groups in substances?

• They determine the color of the substance.

• They form separate units called molecules

• They increase the melting point of the substance.

• They are found only in extended structures.

What is the chemical formula for Isovaleric acid?

• C5H10O2

• C6H12O2

• ZrO2

• C5H8O2

How do ethyl butyrate and Isovaleric acid differ in terms of smell?

• Both smell like citrus.

• Ethyl butyrate smells like citrus, while Isovaleric acid smells like sweaty gym socks.

• Both smell like pineapples.

• Ethyl butyrate has no smell, while Isovaleric acid smells like citrus.