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प्रश्न
What is meant in the periodic table by a period?
उत्तर
In a periodic table, elements are arranged in the order of increasing atomic numbers in horizontal rows called periods.
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संबंधित प्रश्न
On which side of the periodic table will you find metals?
What is the number of elements is 1st period the modern 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.
The elements A, B, C and D belong to groups 1, 2, 14 and 17 respectively of the periodic table. Which of the following pairs of elements would produce a covalent bond?
(i) A and D
(ii) C and D
(iii) A and B
(iv) B and C
(v) A and C
Name two elements in Inert gas.
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Give the chemical formula of sodium hydroxide
Group 1 and 2 : s block : : group 13 and 18 : _______
Which of the following statements about the Modern Periodic Table is correct:
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
