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प्रश्न
Name two elements in Inert gas.
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उत्तर
Neon and Argon.
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संबंधित प्रश्न
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Fill in the following blank with suitable word:
Group 1 elements are called ...............
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 is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Give the symbol and valency of the following element and radical.
Zinc
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
Find the correlation:
Group 13 to 18 : p block : : ______ : d block
Right or wrong sentence.
The modern periodic table has 1 to 7 periods.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
The amount of energy released when one or more electrons is added to the neutral atom is ______
