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प्रश्न
Elements in the modern periodic table are arranged in ______groups and______ periods.
पर्याय
7, 18
18, 7
17, 8
8, 17
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उत्तर
Elements in the modern periodic table are arranged in 18 groups and 7 periods.
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संबंधित प्रश्न
State the modern periodic law.
What is the number of elements in the 1st period?
Define the atomic size.
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Hydroxide
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
Find the odd one out and give its explanation.
On moving from left to right in a period in the periodic table, the size of the atom ______
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
