Question

Write down the electronic
configuration
of the
elements from the given atomic
following
numbers. Answer the following
question with explanation.
a. Li, Si, He,,,Na, P Which of these
elements belong to be period 3?
b. „H, „N, 2.Ca, S, Be, Ar
Which of these elements
belong to the second group?
c. N, C, D, B, A1
Which is the
most
electronegative element among
these?
d. Be, C, 0, B, A1
Which is the most
electropositive element among
these?
e. ,,Na, P, C1, Si, Mg
Which of these has largest
atoms?
f. K, Li, Na, Be
Which of these atoms has
smallest atomic radius?
g. Al, Si, Na, Mg, S
Which of the above elements
has the highest metallic character?
h. C, Li, F, N, NO
Which of the above elements
has
the highest nonmetallic
character?

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Answer 1

Answer:

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Answer 2

1. Na is in 3rd period.

2.Ca belong to group 2

3. nitrogen is most electeonegative among these.

4.B , C , O , Lie in the same period and as we move across period the electropositivity increases, due to decrease in Nuclear charge. Thus Beryllium (Be) is the Most electropositive element among them.

5.Since all the elements given are in third period. Size decreases across the period, hence, The first element Sodium is largest.

6. Be as its in 2nd period and has larger nuclear charge.

7. Na as in group 1

8. Fluorine has higher non metallic charecter