1
Question
Give a one-word answer.
Classification in which elements are grouped into groups of three.
Give a one-word answer.
Classification in which elements are grouped into groups of three.
Open in App
Solution
The Classification in which elements are grouped into groups of three is Dobereiner's triad.
- Dobereiner told that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.
- He stated that the arithmetic mean or an average of the atomic masses of the first and third elements in a triad would be approximately equal to the atomic mass of the second element in that triad.
Example of triads:
Calcium, Barium, and Strontium formed one of Dobereiner’s triads:
Triad Atomic Masses Calcium (Ca) 40.1 Strontium (Sr) 87.6 Barium (Ba) 137.3
The average of the masses of barium and calcium equals to = 88.7 which is near 87.6 i.e. mass of strontium.
The Classification in which elements are grouped into groups of three is Dobereiner's triad.
- Dobereiner told that groups of three elements (triads) could be formed in which all the elements shared similar physical and chemical properties.
- He stated that the arithmetic mean or an average of the atomic masses of the first and third elements in a triad would be approximately equal to the atomic mass of the second element in that triad.
Example of triads:
Calcium, Barium, and Strontium formed one of Dobereiner’s triads:
| Triad | Atomic Masses |
| Calcium (Ca) | 40.1 |
| Strontium (Sr) | 87.6 |
| Barium (Ba) | 137.3 |
The average of the masses of barium and calcium equals to = 88.7 which is near 87.6 i.e. mass of strontium.
Suggest Corrections
0
Similar questions
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
