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  • (a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period

(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
(a) Name the most electropositive element among them
(b) Name the most electronegative element
(c) Name the element with smallest atomic size
(d) Name the element which is a metalloid
(e) Name the element which shows maximum valency.

 

Answers (1)

Atomic Number

 3 4 5 6 7 8 9
Name Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine
Symbol Li Be B C N O F

a) Lithium (atomic number 3) is the most electropositive element in 2nd Period as it is the left most element in the period

d) Fluorine (atomic number 9) is the most electronegative element in 2nd Period as it is the right most element in the period
c) Element with smaller atomic size is fluorine (atomic number 9) as the atomic size decreases as we move from left to right in a period
d) Boron (atomic number 5) is the metalloid in 2nd Period.
e) Carbon (atomic number 6) has the maximum valency of 4.
 

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