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Questions and Answers
What was the purpose of classifying elements in the 19th century?
What was the purpose of classifying elements in the 19th century?
- To complicate the field of chemistry.
- To make the study of individual elements easier. (correct)
- To keep the atomic masses a secret.
- To confuse scientists with unnecessary classifications.
What did Dobereiner attempt to do with his 'Triads' classification?
What did Dobereiner attempt to do with his 'Triads' classification?
- Classify elements based on their size.
- Classify elements with similar properties into groups of three. (correct)
- Classify elements into two big groups.
- Classify elements based on their color.
According to Dobereiner, what was unique about the atomic mass of the element in the middle of a triad?
According to Dobereiner, what was unique about the atomic mass of the element in the middle of a triad?
- It was always lower than the mean of the other two atomic masses.
- It was always equal to the mean of the other two atomic masses. (correct)
- It had no specific relationship to the other two atomic masses.
- It was always higher than the other two elements.
How many triads were mentioned by Dobereiner in his classification system?
How many triads were mentioned by Dobereiner in his classification system?
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What was one of the limitations of Dobereiner's Triads classification?
What was one of the limitations of Dobereiner's Triads classification?
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Why was it important to classify elements into groups during the 19th century?
Why was it important to classify elements into groups during the 19th century?
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Which statement best describes Dobereiner's approach to classification?
Which statement best describes Dobereiner's approach to classification?
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'Triads' in Dobereiner's classification system consisted of how many elements?
'Triads' in Dobereiner's classification system consisted of how many elements?
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