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Questions and Answers
According to the Dobereiner triad rule, how many elements are grouped together?
According to the Dobereiner triad rule, how many elements are grouped together?
- Four
- Three (correct)
- Two
- Five
In a Dobereiner triad, what is the relationship between the atomic weight of the middle element and the average atomic weight of the first and third element?
In a Dobereiner triad, what is the relationship between the atomic weight of the middle element and the average atomic weight of the first and third element?
- The atomic weight of the middle element is equal to the average atomic weight of the first and third element. (correct)
- The atomic weight of the middle element is greater than the average atomic weight of the first and third element.
- The atomic weight of the middle element is unrelated to the average atomic weight of the first and third element.
- The atomic weight of the middle element is less than the average atomic weight of the first and third element.
Which of the following sets of elements is an example of a Dobereiner triad?
Which of the following sets of elements is an example of a Dobereiner triad?
- (Li, Be, B) (correct)
- (Na, Mg, Al)
- (O, S, Se)
- (Ca, Sr, Ba)
Which element's properties are similar to the properties of the 8th element in the Newland Octave Rule?
Which element's properties are similar to the properties of the 8th element in the Newland Octave Rule?
According to the Newland Octave Rule, how did Newland arrange the elements?
According to the Newland Octave Rule, how did Newland arrange the elements?
Which type of elements were not known at the time of the Newland Octave Rule?
Which type of elements were not known at the time of the Newland Octave Rule?
According to the Dobereiner triad rule, how many elements are grouped together?
According to the Dobereiner triad rule, how many elements are grouped together?
According to the Newland Octave Rule, how did Newland arrange the elements?
According to the Newland Octave Rule, how did Newland arrange the elements?
Which of the following sets of elements is an example of a Dobereiner triad?
Which of the following sets of elements is an example of a Dobereiner triad?
Which of the following is a drawback or limitation of the Newland Octave Rule?
Which of the following is a drawback or limitation of the Newland Octave Rule?
Why is the Newland Octave Rule no longer applicable after the discovery of inert gases?
Why is the Newland Octave Rule no longer applicable after the discovery of inert gases?
Why does the Newland Octave Rule fail in the case of heavier metals like Fe?
Why does the Newland Octave Rule fail in the case of heavier metals like Fe?