Question

hi..... !


write doberiener triads !​

Answer 1

Explanation:

it states that when the metals are arranged in the increasing order of their atomic mass then the atomic mass of the middle of the element is equal to average of the atomic mass of two elements

Answer 2

Predicted vs actual atomic mass of the central atom of each triad
Triad name[2] Elements and atomic masses[2][3]
Element 1
Mass Element 2
Mean of 1 and 3
Actual mass Element 3
Mass
Alkali-forming elements Lithium
6.94 Sodium
23.02
22.99 Potassium
39.10
Alkaline-earth-forming elements
[atomic masses verification needed] Calcium
40.1 Strontium
88.7
87.6 Barium
137.3
Salt-forming elements Chlorine
35.470 Bromine
80.470
78.383 Iodine
126.470
Acid-forming elements Sulfur
32.239 Selenium
80.741
79.263 Tellurium
129.243
-
[atomic masses verification needed] Iron
55.8 Cobalt
57.3
58.9 Nickel
58.7



Hope this helps u