Mendeleev's and modern periodic table, trends — atomic size, valency, metallic character.
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Q1 · Periodic Classification of Elements (Class 10) · EASY
Which of the following elements belongs to Group 17 (halogens) of the modern periodic table?
Q2 · Periodic Classification of Elements (Class 10) · MEDIUM
Which of the following properties generally increases on moving from left to right across a period in the periodic table?