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प्रश्न
Give the chemical formula of sodium nitrate
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उत्तर
It denotes in a compound, the number of atoms of element present.
∴ Formula = \[\ce{NaNO3}\]
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संबंधित प्रश्न
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
What are the advantages of the periodic table?
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 type of elements which have one electron short of octet.
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
The scientist who propounded the modern periodic law is ______.
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
