please jldi it's URGENT ..!!
The elements of the second period are given
B 88
Be 111
O 66
N 74
Li 152
C 77
(a) arrange them in increasing order of their atomic radii
(B) which element have the largest and smallest atoms
(c) how do the atomic radii change as you go from left to right in a period
Answers
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Answered
The atomic radii of the element of second period are given below:
Second period element
B
Be
O
N
Li
F
C
Atomic Radii (pm)
88
111
66
74
152
64
77
(a) Arrange these elements in decreasing order of their atomic radii.
(b) Are the elements now arranged in the pattern of a period in the periodic table?
(c) Name the element which has the (i) largest (ii) smallest atomic number.
(d) From the above data, infer how the atomic size or atomic radius of the elements changes as we go from left to right in a period.
(e) Name one metal, one non-metal and a metalloid out of these elements.
(f) Why does atomic radius decreases as we move from left to right in a period?
Asked by Topperlearning User | 24th Jul, 2017, 03:55: PM
Expert Answer:
(a)
Li
Be
B
C
N
O
F
152
111
88
77
74
66
64
(b) Yes, the elements are now arranged in the pattern of a period of periodic table.
(c)
(i)F has the largest atomic number
(ii)Li has the smallest atomic number
(b) Atomic radius decreases on moving from left to right in a period of the periodic table.
(c) Metal:- Li; Non-metal:- C; Metalloid:- B
(d) Atomic radius decreases from left to right in a period because force of attraction for the outermost electrons towards nucleus increases because of increased nuclear charge.