CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313027
Electronic configuration of only one p-block element is exceptional. One molecule of that element consists of how many atoms of it?
1 One
2 Two
3 Three
4 Four
Explanation:
He is p-block element but its electronic configuration does not follow the normal trend of p-block element electronic configuration. Since, He is monoatomic, hence it consists of one atom of it.
MHTCET - 2020
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313028
Which element from the following belongs to oxygen family?
1 \(\mathrm{Ba}\)
2 \(\mathrm{Se}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Ca}\)
Explanation:
Oxygen family (Gr. 16 elements) are \(\mathrm{O}, \mathrm{S}, \mathrm{Se}, \mathrm{Te}, \mathrm{Po}, \mathrm{Lv}\). So, 'Se' is the answer \(\mathrm{Ba}, \mathrm{Ca}\) - belong to group-2 Rb-belongs to group-1.
MHTCET - 2021
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313008
Match Column I with Column II and choose the correct combination from the options given. Column I Column II
(A - R, S) \([\mathrm{Xe}] 4 \mathrm{f}^{14} 5 \mathrm{~d}^{2} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5d subshell so it is d- block element and 5 d subshell is partially filled, so it is also considered transition element. (B - Q, T) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2} 6 \mathrm{p}^{6} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters in 7 s subshell, so it is s-block and representative element. (C - P) \([\mathrm{Rn}] 5 \mathrm{f}^{14} 6 \mathrm{~d}^{1} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 f subshell so it is f-block and inner-transition element. (D - R) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 d subshell so it is d -block element and 5d sub-shell is full filled so it is not considered as transition element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313009
Which of the following is the wrong statement?
1 All the actinide elements are radioactive.
2 Alkali and alkaline earth metals are s-block elements.
3 Chalcogens and halogens are p-block elements.
4 The first member of the lanthanide series is lanthanum.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313027
Electronic configuration of only one p-block element is exceptional. One molecule of that element consists of how many atoms of it?
1 One
2 Two
3 Three
4 Four
Explanation:
He is p-block element but its electronic configuration does not follow the normal trend of p-block element electronic configuration. Since, He is monoatomic, hence it consists of one atom of it.
MHTCET - 2020
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313028
Which element from the following belongs to oxygen family?
1 \(\mathrm{Ba}\)
2 \(\mathrm{Se}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Ca}\)
Explanation:
Oxygen family (Gr. 16 elements) are \(\mathrm{O}, \mathrm{S}, \mathrm{Se}, \mathrm{Te}, \mathrm{Po}, \mathrm{Lv}\). So, 'Se' is the answer \(\mathrm{Ba}, \mathrm{Ca}\) - belong to group-2 Rb-belongs to group-1.
MHTCET - 2021
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313008
Match Column I with Column II and choose the correct combination from the options given. Column I Column II
(A - R, S) \([\mathrm{Xe}] 4 \mathrm{f}^{14} 5 \mathrm{~d}^{2} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5d subshell so it is d- block element and 5 d subshell is partially filled, so it is also considered transition element. (B - Q, T) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2} 6 \mathrm{p}^{6} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters in 7 s subshell, so it is s-block and representative element. (C - P) \([\mathrm{Rn}] 5 \mathrm{f}^{14} 6 \mathrm{~d}^{1} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 f subshell so it is f-block and inner-transition element. (D - R) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 d subshell so it is d -block element and 5d sub-shell is full filled so it is not considered as transition element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313009
Which of the following is the wrong statement?
1 All the actinide elements are radioactive.
2 Alkali and alkaline earth metals are s-block elements.
3 Chalcogens and halogens are p-block elements.
4 The first member of the lanthanide series is lanthanum.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313027
Electronic configuration of only one p-block element is exceptional. One molecule of that element consists of how many atoms of it?
1 One
2 Two
3 Three
4 Four
Explanation:
He is p-block element but its electronic configuration does not follow the normal trend of p-block element electronic configuration. Since, He is monoatomic, hence it consists of one atom of it.
MHTCET - 2020
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313028
Which element from the following belongs to oxygen family?
1 \(\mathrm{Ba}\)
2 \(\mathrm{Se}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Ca}\)
Explanation:
Oxygen family (Gr. 16 elements) are \(\mathrm{O}, \mathrm{S}, \mathrm{Se}, \mathrm{Te}, \mathrm{Po}, \mathrm{Lv}\). So, 'Se' is the answer \(\mathrm{Ba}, \mathrm{Ca}\) - belong to group-2 Rb-belongs to group-1.
MHTCET - 2021
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313008
Match Column I with Column II and choose the correct combination from the options given. Column I Column II
(A - R, S) \([\mathrm{Xe}] 4 \mathrm{f}^{14} 5 \mathrm{~d}^{2} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5d subshell so it is d- block element and 5 d subshell is partially filled, so it is also considered transition element. (B - Q, T) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2} 6 \mathrm{p}^{6} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters in 7 s subshell, so it is s-block and representative element. (C - P) \([\mathrm{Rn}] 5 \mathrm{f}^{14} 6 \mathrm{~d}^{1} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 f subshell so it is f-block and inner-transition element. (D - R) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 d subshell so it is d -block element and 5d sub-shell is full filled so it is not considered as transition element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313009
Which of the following is the wrong statement?
1 All the actinide elements are radioactive.
2 Alkali and alkaline earth metals are s-block elements.
3 Chalcogens and halogens are p-block elements.
4 The first member of the lanthanide series is lanthanum.
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313027
Electronic configuration of only one p-block element is exceptional. One molecule of that element consists of how many atoms of it?
1 One
2 Two
3 Three
4 Four
Explanation:
He is p-block element but its electronic configuration does not follow the normal trend of p-block element electronic configuration. Since, He is monoatomic, hence it consists of one atom of it.
MHTCET - 2020
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313028
Which element from the following belongs to oxygen family?
1 \(\mathrm{Ba}\)
2 \(\mathrm{Se}\)
3 \(\mathrm{Rb}\)
4 \(\mathrm{Ca}\)
Explanation:
Oxygen family (Gr. 16 elements) are \(\mathrm{O}, \mathrm{S}, \mathrm{Se}, \mathrm{Te}, \mathrm{Po}, \mathrm{Lv}\). So, 'Se' is the answer \(\mathrm{Ba}, \mathrm{Ca}\) - belong to group-2 Rb-belongs to group-1.
MHTCET - 2021
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313008
Match Column I with Column II and choose the correct combination from the options given. Column I Column II
(A - R, S) \([\mathrm{Xe}] 4 \mathrm{f}^{14} 5 \mathrm{~d}^{2} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5d subshell so it is d- block element and 5 d subshell is partially filled, so it is also considered transition element. (B - Q, T) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2} 6 \mathrm{p}^{6} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters in 7 s subshell, so it is s-block and representative element. (C - P) \([\mathrm{Rn}] 5 \mathrm{f}^{14} 6 \mathrm{~d}^{1} 7 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 f subshell so it is f-block and inner-transition element. (D - R) [Xe] \(4 \mathrm{f}^{14} 5 \mathrm{~d}^{10} 6 \mathrm{~s}^{2}\) : Last \(\mathrm{e}^{-}\)enters to 5 d subshell so it is d -block element and 5d sub-shell is full filled so it is not considered as transition element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313009
Which of the following is the wrong statement?
1 All the actinide elements are radioactive.
2 Alkali and alkaline earth metals are s-block elements.
3 Chalcogens and halogens are p-block elements.
4 The first member of the lanthanide series is lanthanum.
