Identify the three related matching word answers:
Example:
Dobereiner :: German :: Law of triads
Answer variants:
Groups
Barium
Strontium
Triad Group (\(3\))
\(87.6\)
Seven
Vertical rows
Hint Select the group, example element and their mass.
Option I - :: ::
Hint Select number of rows, on their position named as.
Option II - :: ::