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Last edited 25 days ago by Learn LoopHQ.

Chapter: 03. Elements And Compounds

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What is the main use of carbon dioxide for plants?

How many elements have scientists discovered in total?

How do the melting points of diamond and graphite compare to most other non-metals?

Explain why O_2 and 2O are not the same.

What is atomicity?

How do impurities affect the boiling and freezing points of a pure substance like water?

What is the significance of the Periodic Table?

Give one exception to the general rule that metals are solid at room temperature.

Why are metals generally considered good conductors of heat and electricity?

What is the difference in sonorousness between metals and non-metals?

What is the chemical formula for common salt?

What are minerals?

What is the reason behind iron’s use in heavy tools and machines?

How is an element defined in chemistry?

What information does the chemical formula H_2O provide?

How is a compound formed?

What does it mean for a metal to be malleable?

Name two non-metals that are gases at room temperature.

What are metalloids?

What is the difference between a pure substance and an impure substance?

What happens to energy during the formation of a compound?

How do the properties of a compound compare to its constituent elements?

Give an example of a noble gas.

Provide an example of a diatomic molecule.

Why are copper and aluminium used in electrical wires?

Which non-metal is known for being extremely hard?

What role does iron play in living organisms?

Besides definite chemical composition, what are two other characteristic sensory properties of pure substances?

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