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प्रश्न
Define:
Periodic table
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उत्तर
The periodic table is a tabular arrangement of elements in horizontal rows, called periods, and vertical columns, called groups, to classify elements and facilitate their systematic study.
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संबंधित प्रश्न
What is meant by a period, in a periodic table?
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.
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Zinc
Give the symbol and valency of the following element and radical.
Hydroxide
State any five features of modern periodic table.
The element which has the least tendency to lose electrons is ______
The longest period of the Modern Periodic Table is period.
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
