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प्रश्न
Why do all the elements of the same group have similar properties?
उत्तर
The elements in a group have similar electronic configuration. Hence, they have same number of valence electrons and, therefore they show similar chemical properties
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संबंधित प्रश्न
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.
Give the group number of following elements present in periodic table
Write a short note.
Structure of the modern periodic table.
State the modern periodic law.
What is the number of elements in the 3rd period, of the modern periodic table?
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has a similar structure to diamond.
Define groups of modern periodic table.
An element with atomic number ______ will form a basic oxide.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
