Question

c)
Arrange the following elements in the increasing order of electronegativity.

Be, F, O, N, Li​

Answer 1

Answer:

Li, N, O and F

Explanation:

Electronegativity

Electronegativity is the ability of an atom to push electron towards itself. If we look at the periodic table, it will increase when we move from left to right and it will reduce when we move from top to bottom.

Now looking at the given elements,

F, N, O, li, all these belong to 2nd row of periodic table

F is the most electronegative element and lithium the least . Hence correct order of electronegativity is;

Li, N, O and F

Answer 2

The elements in the increasing order of electronegativity can be arranged as follows :

Li < Be < N < O < F

• Electronegativity is the property of an element to accept electrons in its outermost shell. The greater the nuclear pull on valence electrons, the greater the ability of an element to gain electrons.

• Be, F, O, N, and Li, all belong to period 2 in the periodic table.

• It is a trend in the periodic table that as we move from left to right across a period, the electronegativity of an atom decreases due to an increased nuclear pull on the valence electrons.

• The order in which the given elements lie across the second period in the table is :

Li, Be, N, O, F

• Since the electronegativity increases from left to right in a period, the increasing electronegativity of these elements, too, will follow the same order.

• Therefore, the required arrangement of elements in the increasing order of electronegativity is : Li < Be < N < O < F