Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table
On the basis of the above table, answer the following questions:
a. Name the element which forms only covalent compounds.
b. Which element is a metal with a valency of one?
c. Which element is a non-metal with a valency of two?
d. Out of D and E, which has a bigger atomic radius and why?
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Answer:
a. E
b. D
c. B
d. D
Explanation:
a. E is non- metal and it can forms covalent bond.
b. D is the metal with valency one because it belong to group one. All group 1 elements have their valency as 1
c. B is the element with valency 2 because it belongs to group 16. All the group 16 elements are having valency has 2.
d. D has bigger atomic size, because the electrons are added to shell as the result of this there will less force of attraction between the nucleus and the outermost electrons. In simple least is effective nuclear charge.
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