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प्रश्न
Noble gases belong to______ group of the periodic table.
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उत्तर
Noble gases belong to 18th group of the periodic table.
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संबंधित प्रश्न
State modern periodic law.
Give two example of group 17 elements.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
Name the metals in the first twenty elements.
Name the type of elements which have two electrons in the outermost orbit.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
Write a short note.
Structure of the modern periodic table.
Distinguish between:
s-block - p-block
Group 16 elements are collectively called as ______.
