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On going down a main subgroup in the per...

On going down a main subgroup in the periodic table (example Li to Cs in IA or Be to Ra in IIA) the expected trend of change in atomic radius is a

A

Continuous increase

B

Continuous decrease

C

An increase followed by decrease

D

A decrease followed by increase

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The correct Answer is:
A
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Answer the following question based on the values of the atomic radii of the elements of one of the periods in modern periodic table Li ( 152 ) , Be (111) B, (88) , C (77) ,N (74) ,o (66 ) and F (64) What is the trend of atomic radii of given elements ?

Answer the following question based on the values of the atomic radii of the elements of one of the periods in modern periodic table Li ( 152 ) , Be (111) B, (88) , C (77) ,N (74) ,o (66 ) and F (64) Why the values of atomic radius varied along the period ?

Answer the following question based on the values of the atomic radii of the elements of one of the periods in modern periodic table Li ( 152 ) , Be (111) B, (88) , C (77) ,N (74) ,o (66 ) and F (64) Mention the unit of atomic radius .

How do the following properties change in group - 1 and in the third period? Explain with example. (a) Atomic radius.

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Atomic radii of the noble gases are larger than the precedent elements of the same periods because

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The correct order of radii is

AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -3
  1. The IUPAC name of ""(104)Rf is

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  2. The IUPAC name of ""(107)Bh is

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  3. Screening constant depends upon A) Number of inner shells B) Numbe...

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  4. Screening constant of Be is 2.05 and that of B is

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  5. Write any two properties which are decreased from top to bott...

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  6. Screening by inner electrons will be more effective in

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  7. Correct order of first ionisation potentials

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  8. In a period from left to right A) nuclear charge increases B) eff...

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  9. Relation between oxidation numbers and electronegativity is given by

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  10. Screening effect influences A) atomic radius B) Ionisation enthal...

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  11. {0} is a set contains the element……..

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  12. Number of unpaired electrons in Gd(Z =64) and the net electrons spin a...

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  13. For the process X((g)) + e^(-) rarr X((g))^(-), Delta H =x and X(g)^...

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  14. Some statements are given regarding nature of oxides (i) In second ...

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  15. When an electron adds on F atom, It becomes

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  16. On going down a main subgroup in the periodic table (example Li to Cs ...

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  17. Identify the correct statement

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  18. Identify the correct order in which the ionic radius of the following ...

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  19. The atomic radius decreases in a period due to

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  20. Among the following, the number of elements showing only one non-zero ...

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