Category 1

What are the properties of metals?

• Conductivity

• Brittleness

• Transparency

• Elasticity

What is the importance of metals to modern life?

• Metals are essential for construction, manufacturing, and technology.

• Metals are only used for decorative purposes.

• Metals have no significant role in modern life.

• Metals are primarily used in ancient tools.

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What are the properties of nonmetals?

• Brittle, poor conductors of heat and electricity, high ionization energies

• Good conductors of heat and electricity, malleable, ductile

• Shiny, high melting points, good conductors of electricity

• Malleable, ductile, low ionization energies

What is the importance of nonmetals to modern life?

• Nonmetals are essential for life processes, such as respiration and photosynthesis.

• Nonmetals are primarily used in the construction of buildings and bridges.

• Nonmetals are mainly used as conductors of electricity in electronic devices.

• Nonmetals are used exclusively in the production of metals.

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What are the properties of metalloids?

• They have properties of both metals and non-metals.

• They are completely non-metallic.

• They are highly reactive metals.

• They are gases at room temperature.

What is the importance of metalloids to modern life?

• They are used in semiconductors and electronics.

• They are primarily used as food additives.

• They are mainly used in textile manufacturing.

• They are only used in ancient construction.

What does a subscript in a chemical formula represent?

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How many total atoms are there in the chemical formula C₆H₁₂O₆?

• 18

• 24

• 12

• 6

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In the chemical formula 2Fe₂O₃, how many atoms of Iron are present?

• 4

• 2

• 6

• 8

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NGSS.MS-PS1-1

What is a physical change?

• A change in the state or appearance of a substance without forming a new substance.

• A change that results in the formation of a new substance.

• A change that involves a chemical reaction.

• A change that cannot be reversed.