Question

2. Observe the part of periodic table shown below and answer the questions.
Fig A
small deflection
1
2
He
BEWI
5
Be
6
C
7
N
8
O
9
F
10
Ne
Na
12
Mg
20
13
Al
14
Si
15
P
16
S
17
ci
18
Ar
21
19
K
25
33
22
Ti
23
V
24
Cr
Ca
26
Fe
27
Co
28
Ni
Sc
29
Cu
30
Zn
31
Ga
32
Ge
34
Se
35
Br
36
Kr
Mn
As
a. Name the elements with atomic numbers 5, 8, and 11.
b. Which element is placed next to sodium?
c. Name the element right below carbon.
d. What is the basis of the modern periodic table-atomic number or mass number?
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Answer 1

Answer:

m1&m2 masses of the two particles. r distance between two particles. F gravitational force of attraction. unit. G=Nm^2/kg^2 is the si unit that is newton per metre square per kg square