Question 20: Three elements B, Si and Ge are
Question 21: Which of the following elements will form an acidic oxide?
Question 22: Which one of the following depicts the correct representation of atomic radius(r) of an atom?
Question 23: Which one of the following does not increase while moving down the group of the periodic table?
Question 24: On moving from left to right in a period in the periodic table, the size of the atom.
Question 25: Which of the following set of elements is written in order of their increasing metallic character?
Question 26: The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
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