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प्रश्न
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
उत्तर
(d) In the modern periodic table, the isotopes of chlorine, having different atomic masses are kept in the same group.
The isotopes of chlorine, having different atomic masses but same atomic numbers are kept in the same group in the modern periodic table.
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संबंधित प्रश्न
On which side of the periodic table will you find metals?
What are horizontal rows and vertical columns in a periodic table known as?
State its position in the periodic table?
How many periods and groups are there in the modern periodic table?
In the Modern Periodic Table – atoms of all elements are arranged according to their increasing order of – atomic numbers. An atom of nitrogen has seven protons and seven electrons. State what would be its atomic number.
Give the symbol and valency of the following element and radical.
Chlorine [Chloride]
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the chemical formula of sodium bicarbonate
Find the odd one out and give its explanation.
State any five features of modern periodic table.
