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प्रश्न
Name the noble gas with 3 shells.
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उत्तर
Argon
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संबंधित प्रश्न
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
An element with atomic number ______ will form a basic oxide.
