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प्रश्न
What is the number of elements in the 1st period?
उत्तर
There are two elements in the first period.
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Group 1 elements are called ...............
Explain why, the noble gases are placed in a separate group.
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
Give the group number of following elements present in periodic table
What are horizontal rows and vertical columns in a periodic table known as?
Give the chemical formula of calcium phosphate
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Noble gases belong to______ group of the periodic table.
Noble gases are placed in the ______ group in the modern periodic table.
Explain the position of hydrogen in the periodic table.
