How do the atomic radii of elements change as we go from left to right in a period of the periodic table?

Academic Chemistry NCERT Class 10

On moving from left to right across a period, the atomic size decreases.

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Updated on: 10-Oct-2022

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How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
(a) What is a period in a periodic table? How do atomic structures (electron arrangements) change in a period with increase in atomic numbers from left to right?(b) How do the following change on going from left to right in a period of the periodic table? (i) Chemical reactivity of elements (ii) Nature of oxides of elements Give examples in support of your answer.
How does the valency of elements change on moving from left to right in the third period of the periodic table?
(a) How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?(b) What happens to the metallic character of the elements as we move from left to right in a period of the periodic table?
How does the metallic character of elements change along a period of the periodic table from the left to the right and why?
How do electronic configurations of elements change in second period of periodic table with increase in atomic numbers?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
What is periodicity in properties of elements with reference to the Modern Periodic Table? Why do all the elements of the same group have similar properties? How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change?
How does the number of valence electrons vary on moving from left to right:(i) In the first period of the periodic table? (ii) In the second period of the periodic table?
What happens to the metallic character of the elements as we go down in a group of the periodic table?
On moving from left to right in a period in the periodic table, the size of the atom.increasesdecreasesdoes not change appreciablyfirst decreases and then increases/p>
(a) How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?(b) How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this way?
Periodic Trends of Atomic Radii
(a) How does the electropositive character of elements change on going down in a group of the periodic table?(b) State how the valency of elements varies (i) in a group, and (ii) in a period, of the periodic table.
(a) What is the usual number of valence electrons and valency of group 18 elements of the periodic table?(b) What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?

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