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प्रश्न
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
उत्तर
As we go from left to right in a period of the periodic table, the atomic radii decrease.
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संबंधित प्रश्न
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
What are the periods in a periodic table? Give two characteristics of each.
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
Give the symbol and valency of the following element and radical.
Bicarbonate
State what is meant by the term chemical formula.
State any five features of modern periodic table.
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
Name the non-metals in the first twenty elements.
What is the general name of the last elements of the Periodic Table?
