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Answer:
About 60.
Explanation:
Mendeleev knew of 63 elements. He wrote their properties on cards and arranged them in order of atomic mass.
That's how he discovered that the properties of elements are periodic functions of their atomic masses.
The answer is C. Nicotine is the substance found in tobacco smoke that stimulates the brain.
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Answer:
1 mole of sodium chloride ions
Explanation:
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