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How do atomic radii vary (a) down the gr...

How do atomic radii vary (a) down the group and (b) along the period from left to right?

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Atomic radius generally decreases from left to right across a period. This is because within a period, the outer electrons are present in the same valence shell and the atomic number increases from left to right across a period, resulting in an increased effective nuclear charge. As a result, the attraction of electrons to the nucleus increases.
On the other hand, the atomic radius generally increases down a group. This is because down a group, the principal quantum number (n) increases which results in an increase of the distance between the nucleus and valence electrons.
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(a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period (c) Atomic size increase down the group and decreases across a period (left to right) (d) Metallic character increases down the group and decreases across a period On the basis of the above trends of the periodic table, answer the following about the electron with atomic number 3 to 9 (a) Name the most electropositive element among them (b) Name the most electronegative element (c) Name of the element with smallest atomic size (d) Name the element which is a metalloid (e) Name the element which shows maximum valency.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element with smallest atomic size.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the most electropositive element among them.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the most electronegative element.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element which shows maximum valency.

(a) Electropositive nature of the element(s) increases down the group and decreases across the period. (b) Electronegativity of the element decreases down the group and increases across the period. (c) Atomic size increases down the group and decreases across a period (left to right). (d) Metallic character increases down the group and decreases across a period. On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9. Name the element which is a metalloid.

How does electronegativity vary down the group 17 and why? How does it vary from left to right in period? Name an element having highest electronegativity.

NCERT-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-EXERCISE
  1. Why do elements with similar properties occur in the same group?

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  2. What do atomic radius and ionic radius really mean to you?

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  3. How do atomic radii vary (a) down the group and (b) along the period f...

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  4. What do you understand by isoelectronic species? Name a species that w...

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  5. Consider the following species: N^(3-),O^(2-),F^(ө),Na^(o+),Mg^(2+) ...

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  6. Explain why cations are smaller and anions larger in radii than their ...

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  7. What is the significance of the terms-'isolated gaseous atom' and 'gro...

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  8. Energy of an electron in the ground state of the hydrogen atom is -2.1...

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  9. Among the second period elements the actual ionisation enthalpies are ...

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  10. How would you explain the fact that the first ionisation enthalpy of s...

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  11. What are the various factors due to which the ionisation enthalpy of t...

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  12. The first ionisation enthalpy of group 13 elements are : Explain ...

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  13. Which of the following pairs of elements would have a more negative el...

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  14. Would you expect the second electron gain enthalpy of O as positive, m...

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  15. What is the basic difference between the terms electron gain enthalpy ...

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  16. How would you react to the statement that the electronegativity of N o...

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  17. Describe the theory associated with the radius of an atom as it a. g...

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  18. Would you expect the first ionisation enthalpies for two isotopes of t...

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  19. What are the major differences between metals and non-metals?

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  20. Use the periodic table to answer the following questions. a. Identif...

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