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प्रश्न
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
उत्तर
As we move from left to right in a period, the size decreases, therefore, it will be smaller than Cesium.
संबंधित प्रश्न
Give two example of group 17 elements.
The modern periodic table was prepared by ______.
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
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?
Which of the following statements about the Modern periodic table is correct?
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: ______
Group 16 elements are collectively called as ______.
