Trying to find the right answer to this..

Periodic Classification of Elements

Name the triads that Dobereiner could suggest?

Döbereiner suggested the following triads:
(i) Alkali metal family—Li, Na, K
(ii) Alkaline earth family—Ca, Sr, Ba
(iii) Halogen family—CI, Br, I

923 Views

What made scientists to think of classification?

Consider the following elements:
K, I, Li, Sr, CI, Mg, Br, Ca, Na.
Separate these elements in three groups or triads having similar properties. State one property in each case on the basis of which groups are separated.

Why elements need to be classify?

Lithium, sodium and potassium were put in one group or triad on the basis of their similiar properties. What is the name of this group? State their properties.

First 12 13 14 Last