Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as Give one example

The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.

Answers (1)

Such an arrangement of elements is called triad, as in Dobereiner’s Triads.
Doberenier’s Triads: It is the arrangement of elements as a set containing 3 elements where mass of
middle element is equal or close to the average of other two elements.
Y= \frac{X+Z}{2}
For example,
Lithium (Atomic mass 7), Sodium (Atomic mass 23) and Potassium (Atomic mass 39)
Average atomic mass of Li and K = \frac{39+7}{2}= 23

Posted by

infoexpert27

View full answer

Similar Questions

Latest Question