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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313421 The element with the lowest atomic number having ground state electron configuration of $(n - 1) d^{10} n s^{2} n p^{3}$ 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 $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ 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 $La$ $(Z = 57)$ is $5 d^{1} 6 s^{2}$ .
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

5^{t h}

period.

2 Filling of 4f orbital begins with Ce in

6^{t h}

period.

3 Filling of 5d orbital begins with La in

5^{t h}

period.

4 Filling of 4f orbital begins with La in

6^{t h}

period.

CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313421 The element with the lowest atomic number having ground state electron configuration of $(n - 1) d^{10} n s^{2} n p^{3}$ 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 $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ 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 $La$ $(Z = 57)$ is $5 d^{1} 6 s^{2}$ .
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

5^{t h}

period.

2 Filling of 4f orbital begins with Ce in

6^{t h}

period.

3 Filling of 5d orbital begins with La in

5^{t h}

period.

4 Filling of 4f orbital begins with La in

6^{t h}

period.

CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313421 The element with the lowest atomic number having ground state electron configuration of $(n - 1) d^{10} n s^{2} n p^{3}$ 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 $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ 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 $La$ $(Z = 57)$ is $5 d^{1} 6 s^{2}$ .
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

5^{t h}

period.

2 Filling of 4f orbital begins with Ce in

6^{t h}

period.

3 Filling of 5d orbital begins with La in

5^{t h}

period.

4 Filling of 4f orbital begins with La in

6^{t h}

period.

CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

313421 The element with the lowest atomic number having ground state electron configuration of $(n - 1) d^{10} n s^{2} n p^{3}$ 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 $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ 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 $La$ $(Z = 57)$ is $5 d^{1} 6 s^{2}$ .
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

5^{t h}

period.

2 Filling of 4f orbital begins with Ce in

6^{t h}

period.

3 Filling of 5d orbital begins with La in

5^{t h}

period.

4 Filling of 4f orbital begins with La in

6^{t h}

period.