CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313421
The element with the lowest atomic number having ground state electron configuration of \(\left( {{\rm{n - 1}}} \right){{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{3}}}\) is placed in the
1 third period
2 fourth period
3 fifth period
4 sixth period
Explanation:
For lowest atomic number of the element, n - 1 = 3 \( \Rightarrow \) n = 4, hence 4th period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313422
An atom of element has 2K, 8L and 3M electrons. Then that element is placed in
1 IA group
2 II A group
3 III A group
4 IV A group
Explanation:
Electronic configuration is \({\rm{1}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{p}}^{\rm{6}}}\,{\rm{3}}{{\rm{s}}^{\rm{2}}}\,{\rm{3}}{{\rm{p}}^{\rm{1}}}\) and the element is Aluminium which belongs to group 13 or IIIA.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313423
The element with atomic number 57 belongs to:
1 s - block
2 p - block
3 d - block
4 f - block
Explanation:
The element with atomic number 57 is La. The outer electronic configuration of \(\mathrm{La}\) \((\mathrm{Z}=57)\) is \(5 \mathrm{~d}^{1} 6 \mathrm{~s}^{2}\). So, it is d-block element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313424
Identify the correct statement
1 Filling of 5d orbital begins with Hf in \({{\rm{5}}^{{\rm{th}}}}\) period.
2 Filling of 4f orbital begins with Ce in \({{\rm{6}}^{{\rm{th}}}}\) period.
3 Filling of 5d orbital begins with La in \({{\rm{5}}^{{\rm{th}}}}\) period.
4 Filling of 4f orbital begins with La in \({{\rm{6}}^{{\rm{th}}}}\) period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313421
The element with the lowest atomic number having ground state electron configuration of \(\left( {{\rm{n - 1}}} \right){{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{3}}}\) is placed in the
1 third period
2 fourth period
3 fifth period
4 sixth period
Explanation:
For lowest atomic number of the element, n - 1 = 3 \( \Rightarrow \) n = 4, hence 4th period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313422
An atom of element has 2K, 8L and 3M electrons. Then that element is placed in
1 IA group
2 II A group
3 III A group
4 IV A group
Explanation:
Electronic configuration is \({\rm{1}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{p}}^{\rm{6}}}\,{\rm{3}}{{\rm{s}}^{\rm{2}}}\,{\rm{3}}{{\rm{p}}^{\rm{1}}}\) and the element is Aluminium which belongs to group 13 or IIIA.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313423
The element with atomic number 57 belongs to:
1 s - block
2 p - block
3 d - block
4 f - block
Explanation:
The element with atomic number 57 is La. The outer electronic configuration of \(\mathrm{La}\) \((\mathrm{Z}=57)\) is \(5 \mathrm{~d}^{1} 6 \mathrm{~s}^{2}\). So, it is d-block element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313424
Identify the correct statement
1 Filling of 5d orbital begins with Hf in \({{\rm{5}}^{{\rm{th}}}}\) period.
2 Filling of 4f orbital begins with Ce in \({{\rm{6}}^{{\rm{th}}}}\) period.
3 Filling of 5d orbital begins with La in \({{\rm{5}}^{{\rm{th}}}}\) period.
4 Filling of 4f orbital begins with La in \({{\rm{6}}^{{\rm{th}}}}\) period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313421
The element with the lowest atomic number having ground state electron configuration of \(\left( {{\rm{n - 1}}} \right){{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{3}}}\) is placed in the
1 third period
2 fourth period
3 fifth period
4 sixth period
Explanation:
For lowest atomic number of the element, n - 1 = 3 \( \Rightarrow \) n = 4, hence 4th period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313422
An atom of element has 2K, 8L and 3M electrons. Then that element is placed in
1 IA group
2 II A group
3 III A group
4 IV A group
Explanation:
Electronic configuration is \({\rm{1}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{p}}^{\rm{6}}}\,{\rm{3}}{{\rm{s}}^{\rm{2}}}\,{\rm{3}}{{\rm{p}}^{\rm{1}}}\) and the element is Aluminium which belongs to group 13 or IIIA.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313423
The element with atomic number 57 belongs to:
1 s - block
2 p - block
3 d - block
4 f - block
Explanation:
The element with atomic number 57 is La. The outer electronic configuration of \(\mathrm{La}\) \((\mathrm{Z}=57)\) is \(5 \mathrm{~d}^{1} 6 \mathrm{~s}^{2}\). So, it is d-block element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313424
Identify the correct statement
1 Filling of 5d orbital begins with Hf in \({{\rm{5}}^{{\rm{th}}}}\) period.
2 Filling of 4f orbital begins with Ce in \({{\rm{6}}^{{\rm{th}}}}\) period.
3 Filling of 5d orbital begins with La in \({{\rm{5}}^{{\rm{th}}}}\) period.
4 Filling of 4f orbital begins with La in \({{\rm{6}}^{{\rm{th}}}}\) period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313421
The element with the lowest atomic number having ground state electron configuration of \(\left( {{\rm{n - 1}}} \right){{\rm{d}}^{{\rm{10}}}}{\rm{n}}{{\rm{s}}^{\rm{2}}}{\rm{n}}{{\rm{p}}^{\rm{3}}}\) is placed in the
1 third period
2 fourth period
3 fifth period
4 sixth period
Explanation:
For lowest atomic number of the element, n - 1 = 3 \( \Rightarrow \) n = 4, hence 4th period.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313422
An atom of element has 2K, 8L and 3M electrons. Then that element is placed in
1 IA group
2 II A group
3 III A group
4 IV A group
Explanation:
Electronic configuration is \({\rm{1}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{s}}^{\rm{2}}}\,{\rm{2}}{{\rm{p}}^{\rm{6}}}\,{\rm{3}}{{\rm{s}}^{\rm{2}}}\,{\rm{3}}{{\rm{p}}^{\rm{1}}}\) and the element is Aluminium which belongs to group 13 or IIIA.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313423
The element with atomic number 57 belongs to:
1 s - block
2 p - block
3 d - block
4 f - block
Explanation:
The element with atomic number 57 is La. The outer electronic configuration of \(\mathrm{La}\) \((\mathrm{Z}=57)\) is \(5 \mathrm{~d}^{1} 6 \mathrm{~s}^{2}\). So, it is d-block element.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313424
Identify the correct statement
1 Filling of 5d orbital begins with Hf in \({{\rm{5}}^{{\rm{th}}}}\) period.
2 Filling of 4f orbital begins with Ce in \({{\rm{6}}^{{\rm{th}}}}\) period.
3 Filling of 5d orbital begins with La in \({{\rm{5}}^{{\rm{th}}}}\) period.
4 Filling of 4f orbital begins with La in \({{\rm{6}}^{{\rm{th}}}}\) period.
