Question

Read the following and answer all four (4) questions each carries one mark:
Atomic size : The term atomic size refers to the radius of an atom. The atomic size may be visualized
as the distance between the centre of nucleus and the outermost shell of an isolated atom. The
atomic radius of hydrogen atom is 37 pm (picometer, 1 pm = 10-12 m)
Variation of atomic radius with atomic number across the second period is given below
160
Li
140+.
120
Be
Atomic radius/pm
100
B В
80
CN
OF
60
10
4 6 8
Atomic number (2)
a
Which of the following correctly represented the increasing order of atomic size
a
a)
F, N, Be, Li
b)
Be, B, N, O
C
Li, Be, O, F
d)
B, C, N, F
ii)
Atomic radius of H and Li are:
a)
150 pm and 150 pm
b)
100 pm and 150 pm
c)
37 pm and 150 pm
d)
150 pm and 37 pm
Across the second period when atomic number increases atomic size
a)
increases
b)
remains same
c)
increases then decreases
d)
decreases
iv)
Which among the elements have highest atomic size?
a)
F
b)
С
c)
Be
d)
L​

Answer 1

Answer:

Explanation:

An electron moves along vertical line and towards observer, the pattern of concentric circular field lines ofmagnetic field which is produced due to its motion :-

10 qool shoupe A

no no

(1) ACW, In horizontal plane

(2) ACW, In vertical plane

Bil otopoM sw

(3) CW, In horizontal plane

(4) CW, In vertical plane

Answer 2

Answer:

Answer of above passage

1. a

2. b

3. c

4. a