Classification of Elements and Periodicity in Properties
89348
In a periodic table the basic character of oxides
1 increases from left to right and decreases from top to bottom
2 decreases from right to left and increases from top to bottom
3 decreases from left to right and increases from top to bottom
4 decreases from left to right and increases from bottom to top.
Explanation:
In the periodic table, on moving along a period, the tendency to lose electrons decreases and thus, the metallic character decrease since the oxides of non-metal are acidic. Thus, on moving along a period from left to right basic character decrease. While on moving down top to bottom in a group basic character increases due to increase in metallic character.
WB-JEE-2010
Classification of Elements and Periodicity in Properties
89349
In which one of the following pairs the radius of the second species is greater than that of the first?
1 $\mathrm{Na}, \mathrm{Mg}$
2 $\mathrm{O}^{2-}, \mathrm{N}^{3-}$
3 $\mathrm{Li}^{+}, \mathrm{Be}^{2+}$
4 $\mathrm{Ba}^{2+}, \mathrm{Sr}^{2+}$
5 $\mathrm{Al}, \mathrm{Be}$
Explanation:
$\mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ both are isoelectronic but differ in the charge possessed by them as the negative charge increases, the electrons are held less tightly by the nucleus, therefore $\mathrm{O}^{2-}, \mathrm{N}^{3-}$ have greater the electrons more the repulsion and hence the larger size.
Kerala-CEE-2007
Classification of Elements and Periodicity in Properties
89350
Which of the following does not exhibit the periodicity in properties of the elements?
1 s-block
2 d-block
3 p-block
4 f-block
Explanation:
All the periodic properties exhibit regular trends while moving across the period as well as moving down the group but in exactly opposite manner. The $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner and hence p-block element not show the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89351
Which of the following does not exhibit the periodicity in properties of the elements?
1 Ionisation energy
2 $\mathrm{n} / \mathrm{p}$ ratio
3 Electro negativity
4 Atomic radius
Explanation:
Electron affinity, Electronegativity and atomic radius follow the periodicity in properties of the element but $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner. Hence, the $\mathrm{n} / \mathrm{p}$ ratio does not exhibit the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89352
The first artificial disintegration of an atomic nucleus was achieved by:
1 Geiger
2 Wilson
3 Madam Curie
4 Rutherford
Explanation:
The first artificial disintegration is the term coined by Ernest Rutherford, for the process by which an atomic nucleus is broken by bombarding it with high speed alpha particle's either from a particle accelerator or a naturally decaying radioactive substance such as radium.
Classification of Elements and Periodicity in Properties
89348
In a periodic table the basic character of oxides
1 increases from left to right and decreases from top to bottom
2 decreases from right to left and increases from top to bottom
3 decreases from left to right and increases from top to bottom
4 decreases from left to right and increases from bottom to top.
Explanation:
In the periodic table, on moving along a period, the tendency to lose electrons decreases and thus, the metallic character decrease since the oxides of non-metal are acidic. Thus, on moving along a period from left to right basic character decrease. While on moving down top to bottom in a group basic character increases due to increase in metallic character.
WB-JEE-2010
Classification of Elements and Periodicity in Properties
89349
In which one of the following pairs the radius of the second species is greater than that of the first?
1 $\mathrm{Na}, \mathrm{Mg}$
2 $\mathrm{O}^{2-}, \mathrm{N}^{3-}$
3 $\mathrm{Li}^{+}, \mathrm{Be}^{2+}$
4 $\mathrm{Ba}^{2+}, \mathrm{Sr}^{2+}$
5 $\mathrm{Al}, \mathrm{Be}$
Explanation:
$\mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ both are isoelectronic but differ in the charge possessed by them as the negative charge increases, the electrons are held less tightly by the nucleus, therefore $\mathrm{O}^{2-}, \mathrm{N}^{3-}$ have greater the electrons more the repulsion and hence the larger size.
Kerala-CEE-2007
Classification of Elements and Periodicity in Properties
89350
Which of the following does not exhibit the periodicity in properties of the elements?
1 s-block
2 d-block
3 p-block
4 f-block
Explanation:
All the periodic properties exhibit regular trends while moving across the period as well as moving down the group but in exactly opposite manner. The $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner and hence p-block element not show the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89351
Which of the following does not exhibit the periodicity in properties of the elements?
1 Ionisation energy
2 $\mathrm{n} / \mathrm{p}$ ratio
3 Electro negativity
4 Atomic radius
Explanation:
Electron affinity, Electronegativity and atomic radius follow the periodicity in properties of the element but $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner. Hence, the $\mathrm{n} / \mathrm{p}$ ratio does not exhibit the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89352
The first artificial disintegration of an atomic nucleus was achieved by:
1 Geiger
2 Wilson
3 Madam Curie
4 Rutherford
Explanation:
The first artificial disintegration is the term coined by Ernest Rutherford, for the process by which an atomic nucleus is broken by bombarding it with high speed alpha particle's either from a particle accelerator or a naturally decaying radioactive substance such as radium.
Classification of Elements and Periodicity in Properties
89348
In a periodic table the basic character of oxides
1 increases from left to right and decreases from top to bottom
2 decreases from right to left and increases from top to bottom
3 decreases from left to right and increases from top to bottom
4 decreases from left to right and increases from bottom to top.
Explanation:
In the periodic table, on moving along a period, the tendency to lose electrons decreases and thus, the metallic character decrease since the oxides of non-metal are acidic. Thus, on moving along a period from left to right basic character decrease. While on moving down top to bottom in a group basic character increases due to increase in metallic character.
WB-JEE-2010
Classification of Elements and Periodicity in Properties
89349
In which one of the following pairs the radius of the second species is greater than that of the first?
1 $\mathrm{Na}, \mathrm{Mg}$
2 $\mathrm{O}^{2-}, \mathrm{N}^{3-}$
3 $\mathrm{Li}^{+}, \mathrm{Be}^{2+}$
4 $\mathrm{Ba}^{2+}, \mathrm{Sr}^{2+}$
5 $\mathrm{Al}, \mathrm{Be}$
Explanation:
$\mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ both are isoelectronic but differ in the charge possessed by them as the negative charge increases, the electrons are held less tightly by the nucleus, therefore $\mathrm{O}^{2-}, \mathrm{N}^{3-}$ have greater the electrons more the repulsion and hence the larger size.
Kerala-CEE-2007
Classification of Elements and Periodicity in Properties
89350
Which of the following does not exhibit the periodicity in properties of the elements?
1 s-block
2 d-block
3 p-block
4 f-block
Explanation:
All the periodic properties exhibit regular trends while moving across the period as well as moving down the group but in exactly opposite manner. The $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner and hence p-block element not show the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89351
Which of the following does not exhibit the periodicity in properties of the elements?
1 Ionisation energy
2 $\mathrm{n} / \mathrm{p}$ ratio
3 Electro negativity
4 Atomic radius
Explanation:
Electron affinity, Electronegativity and atomic radius follow the periodicity in properties of the element but $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner. Hence, the $\mathrm{n} / \mathrm{p}$ ratio does not exhibit the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89352
The first artificial disintegration of an atomic nucleus was achieved by:
1 Geiger
2 Wilson
3 Madam Curie
4 Rutherford
Explanation:
The first artificial disintegration is the term coined by Ernest Rutherford, for the process by which an atomic nucleus is broken by bombarding it with high speed alpha particle's either from a particle accelerator or a naturally decaying radioactive substance such as radium.
Classification of Elements and Periodicity in Properties
89348
In a periodic table the basic character of oxides
1 increases from left to right and decreases from top to bottom
2 decreases from right to left and increases from top to bottom
3 decreases from left to right and increases from top to bottom
4 decreases from left to right and increases from bottom to top.
Explanation:
In the periodic table, on moving along a period, the tendency to lose electrons decreases and thus, the metallic character decrease since the oxides of non-metal are acidic. Thus, on moving along a period from left to right basic character decrease. While on moving down top to bottom in a group basic character increases due to increase in metallic character.
WB-JEE-2010
Classification of Elements and Periodicity in Properties
89349
In which one of the following pairs the radius of the second species is greater than that of the first?
1 $\mathrm{Na}, \mathrm{Mg}$
2 $\mathrm{O}^{2-}, \mathrm{N}^{3-}$
3 $\mathrm{Li}^{+}, \mathrm{Be}^{2+}$
4 $\mathrm{Ba}^{2+}, \mathrm{Sr}^{2+}$
5 $\mathrm{Al}, \mathrm{Be}$
Explanation:
$\mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ both are isoelectronic but differ in the charge possessed by them as the negative charge increases, the electrons are held less tightly by the nucleus, therefore $\mathrm{O}^{2-}, \mathrm{N}^{3-}$ have greater the electrons more the repulsion and hence the larger size.
Kerala-CEE-2007
Classification of Elements and Periodicity in Properties
89350
Which of the following does not exhibit the periodicity in properties of the elements?
1 s-block
2 d-block
3 p-block
4 f-block
Explanation:
All the periodic properties exhibit regular trends while moving across the period as well as moving down the group but in exactly opposite manner. The $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner and hence p-block element not show the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89351
Which of the following does not exhibit the periodicity in properties of the elements?
1 Ionisation energy
2 $\mathrm{n} / \mathrm{p}$ ratio
3 Electro negativity
4 Atomic radius
Explanation:
Electron affinity, Electronegativity and atomic radius follow the periodicity in properties of the element but $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner. Hence, the $\mathrm{n} / \mathrm{p}$ ratio does not exhibit the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89352
The first artificial disintegration of an atomic nucleus was achieved by:
1 Geiger
2 Wilson
3 Madam Curie
4 Rutherford
Explanation:
The first artificial disintegration is the term coined by Ernest Rutherford, for the process by which an atomic nucleus is broken by bombarding it with high speed alpha particle's either from a particle accelerator or a naturally decaying radioactive substance such as radium.
Classification of Elements and Periodicity in Properties
89348
In a periodic table the basic character of oxides
1 increases from left to right and decreases from top to bottom
2 decreases from right to left and increases from top to bottom
3 decreases from left to right and increases from top to bottom
4 decreases from left to right and increases from bottom to top.
Explanation:
In the periodic table, on moving along a period, the tendency to lose electrons decreases and thus, the metallic character decrease since the oxides of non-metal are acidic. Thus, on moving along a period from left to right basic character decrease. While on moving down top to bottom in a group basic character increases due to increase in metallic character.
WB-JEE-2010
Classification of Elements and Periodicity in Properties
89349
In which one of the following pairs the radius of the second species is greater than that of the first?
1 $\mathrm{Na}, \mathrm{Mg}$
2 $\mathrm{O}^{2-}, \mathrm{N}^{3-}$
3 $\mathrm{Li}^{+}, \mathrm{Be}^{2+}$
4 $\mathrm{Ba}^{2+}, \mathrm{Sr}^{2+}$
5 $\mathrm{Al}, \mathrm{Be}$
Explanation:
$\mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ both are isoelectronic but differ in the charge possessed by them as the negative charge increases, the electrons are held less tightly by the nucleus, therefore $\mathrm{O}^{2-}, \mathrm{N}^{3-}$ have greater the electrons more the repulsion and hence the larger size.
Kerala-CEE-2007
Classification of Elements and Periodicity in Properties
89350
Which of the following does not exhibit the periodicity in properties of the elements?
1 s-block
2 d-block
3 p-block
4 f-block
Explanation:
All the periodic properties exhibit regular trends while moving across the period as well as moving down the group but in exactly opposite manner. The $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner and hence p-block element not show the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89351
Which of the following does not exhibit the periodicity in properties of the elements?
1 Ionisation energy
2 $\mathrm{n} / \mathrm{p}$ ratio
3 Electro negativity
4 Atomic radius
Explanation:
Electron affinity, Electronegativity and atomic radius follow the periodicity in properties of the element but $\mathrm{n} / \mathrm{p}$ ratio does not behave in this manner. Hence, the $\mathrm{n} / \mathrm{p}$ ratio does not exhibit the periodicity in properties of the element.
CG PET -2005
Classification of Elements and Periodicity in Properties
89352
The first artificial disintegration of an atomic nucleus was achieved by:
1 Geiger
2 Wilson
3 Madam Curie
4 Rutherford
Explanation:
The first artificial disintegration is the term coined by Ernest Rutherford, for the process by which an atomic nucleus is broken by bombarding it with high speed alpha particle's either from a particle accelerator or a naturally decaying radioactive substance such as radium.
