MATCH THE COLUMN
GIVE SCIENTIFIC REASONS [Textual]
Atomic size increases down the group
Metallic character decreases from left to right in a period
Elements in the same group show the same valency
GIVE SCIENTIFIC REASONS [Non Textual]
Chlorine is placed in VII A group in the modern periodic table.
Metallic character decreases across a period.
Group VII A elements are strong non-metals and group I A elements are strong metals.
Non-metallic character increases across a period.
Atomic size decreases across a period.
The family of noble gases is called as zero group.
Valency varies gradually across a period.
ANSWER THE FOLLOWING
How could the modern periodic table remove various anomalies of Mendeleev's periodic table?
In modern periodic table, which are the metals, non metals and metalloids among the first 20 elements?
What are the demerits of Mendeleev's Periodic table?
Define atomic size. How does it vary in a period and in a group?
Name three elements