Podcast
Questions and Answers
How are pure substances defined?
How are pure substances defined?
Why are different elements/compounds classified together?
Why are different elements/compounds classified together?
How many elements are currently known?
How many elements are currently known?
What is the basis for the classification of elements into metals and nonmetals?
What is the basis for the classification of elements into metals and nonmetals?
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Why are elements grouped together for classification?
Why are elements grouped together for classification?
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Which metal is the most abundant in the earth's crust?
Which metal is the most abundant in the earth's crust?
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In what form are highly reactive metals like sodium and potassium found in nature?
In what form are highly reactive metals like sodium and potassium found in nature?
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Which non-metal is found in its free state in the atmosphere?
Which non-metal is found in its free state in the atmosphere?
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In what state does carbon exist as diamond and graphite?
In what state does carbon exist as diamond and graphite?
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Which metal is an example of a less reactive metal found in nature in its elemental state?
Which metal is an example of a less reactive metal found in nature in its elemental state?
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