(A) Across a period 1.E. increases in general. Ionization enthalpy of Be is higher than B because of the presence of fullyfilled 2s-orbital. (B) Atomic radius decreases across the period. (C) Metallic character increases down the group and decreases across the period. (D) In group 16 ,sulphur has the highest negative electron gain enthalpy and oxygen has the least.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313386
Among the following elements, the one that has high ionisation energy and positive electron gain enthalpy is
1 H
2 He
3 Be
4 B
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313387
Which of the following statements is wrong?
1 van der Waal’s radius of iodine is more than its covalent radius
2 All isoelectronic ions belong to same period of the periodic table
3 \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{1}}}\) of N is higher than that of O while \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{2}}}\) of O is higher than that of N
4 The electron gain enthalpy of N is almost zero while that of P is \({\rm{74}}{\rm{.3}}\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
Explanation:
In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
(A) Across a period 1.E. increases in general. Ionization enthalpy of Be is higher than B because of the presence of fullyfilled 2s-orbital. (B) Atomic radius decreases across the period. (C) Metallic character increases down the group and decreases across the period. (D) In group 16 ,sulphur has the highest negative electron gain enthalpy and oxygen has the least.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313386
Among the following elements, the one that has high ionisation energy and positive electron gain enthalpy is
1 H
2 He
3 Be
4 B
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313387
Which of the following statements is wrong?
1 van der Waal’s radius of iodine is more than its covalent radius
2 All isoelectronic ions belong to same period of the periodic table
3 \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{1}}}\) of N is higher than that of O while \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{2}}}\) of O is higher than that of N
4 The electron gain enthalpy of N is almost zero while that of P is \({\rm{74}}{\rm{.3}}\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
Explanation:
In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
(A) Across a period 1.E. increases in general. Ionization enthalpy of Be is higher than B because of the presence of fullyfilled 2s-orbital. (B) Atomic radius decreases across the period. (C) Metallic character increases down the group and decreases across the period. (D) In group 16 ,sulphur has the highest negative electron gain enthalpy and oxygen has the least.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313386
Among the following elements, the one that has high ionisation energy and positive electron gain enthalpy is
1 H
2 He
3 Be
4 B
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313387
Which of the following statements is wrong?
1 van der Waal’s radius of iodine is more than its covalent radius
2 All isoelectronic ions belong to same period of the periodic table
3 \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{1}}}\) of N is higher than that of O while \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{2}}}\) of O is higher than that of N
4 The electron gain enthalpy of N is almost zero while that of P is \({\rm{74}}{\rm{.3}}\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
Explanation:
In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
(A) Across a period 1.E. increases in general. Ionization enthalpy of Be is higher than B because of the presence of fullyfilled 2s-orbital. (B) Atomic radius decreases across the period. (C) Metallic character increases down the group and decreases across the period. (D) In group 16 ,sulphur has the highest negative electron gain enthalpy and oxygen has the least.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313386
Among the following elements, the one that has high ionisation energy and positive electron gain enthalpy is
1 H
2 He
3 Be
4 B
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313387
Which of the following statements is wrong?
1 van der Waal’s radius of iodine is more than its covalent radius
2 All isoelectronic ions belong to same period of the periodic table
3 \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{1}}}\) of N is higher than that of O while \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{2}}}\) of O is higher than that of N
4 The electron gain enthalpy of N is almost zero while that of P is \({\rm{74}}{\rm{.3}}\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
Explanation:
In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
(A) Across a period 1.E. increases in general. Ionization enthalpy of Be is higher than B because of the presence of fullyfilled 2s-orbital. (B) Atomic radius decreases across the period. (C) Metallic character increases down the group and decreases across the period. (D) In group 16 ,sulphur has the highest negative electron gain enthalpy and oxygen has the least.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313386
Among the following elements, the one that has high ionisation energy and positive electron gain enthalpy is
1 H
2 He
3 Be
4 B
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313387
Which of the following statements is wrong?
1 van der Waal’s radius of iodine is more than its covalent radius
2 All isoelectronic ions belong to same period of the periodic table
3 \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{1}}}\) of N is higher than that of O while \({\rm{I}}{\rm{.E}}{{\rm{.}}_{\rm{2}}}\) of O is higher than that of N
4 The electron gain enthalpy of N is almost zero while that of P is \({\rm{74}}{\rm{.3}}\,{\rm{kJ}}\,{\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
Explanation:
In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
