321578
Which of the following elements belongs to actinoid series ?
1 La
2
3
4
Explanation:
Th is an actinoid.
CHXII08:THE D- & F-BLOCK ELEMENTS
321579
Europium is
1 s-block element
2 p-block element
3 d-block element
4 f-block element
Explanation:
Europium (atomic number 53) belongs to lanthanide series of f-block. Its electronic configuration is
CHXII08:THE D- & F-BLOCK ELEMENTS
321580
Statement A : The three series of the transition metals are 3d-series ( to ), 4d series ( to ) and 5d-series. (La, Hf to ) Statement B : The two series of the inner transition metals (4f and ) are known as actinoids and lanthanoids, respectively.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The three main series of the transition metals are series (), series ( ) and series (La to omitting to ). The fourth series [ Ac, to ]. The two series of the inner-transition metals, (4f and 5f) are known as lanthanoids and actinoids respectively.
CHXII08:THE D- & F-BLOCK ELEMENTS
321581
The elements in which differentiating electrons are progressively filled in orbital are called
321578
Which of the following elements belongs to actinoid series ?
1 La
2
3
4
Explanation:
Th is an actinoid.
CHXII08:THE D- & F-BLOCK ELEMENTS
321579
Europium is
1 s-block element
2 p-block element
3 d-block element
4 f-block element
Explanation:
Europium (atomic number 53) belongs to lanthanide series of f-block. Its electronic configuration is
CHXII08:THE D- & F-BLOCK ELEMENTS
321580
Statement A : The three series of the transition metals are 3d-series ( to ), 4d series ( to ) and 5d-series. (La, Hf to ) Statement B : The two series of the inner transition metals (4f and ) are known as actinoids and lanthanoids, respectively.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The three main series of the transition metals are series (), series ( ) and series (La to omitting to ). The fourth series [ Ac, to ]. The two series of the inner-transition metals, (4f and 5f) are known as lanthanoids and actinoids respectively.
CHXII08:THE D- & F-BLOCK ELEMENTS
321581
The elements in which differentiating electrons are progressively filled in orbital are called
321578
Which of the following elements belongs to actinoid series ?
1 La
2
3
4
Explanation:
Th is an actinoid.
CHXII08:THE D- & F-BLOCK ELEMENTS
321579
Europium is
1 s-block element
2 p-block element
3 d-block element
4 f-block element
Explanation:
Europium (atomic number 53) belongs to lanthanide series of f-block. Its electronic configuration is
CHXII08:THE D- & F-BLOCK ELEMENTS
321580
Statement A : The three series of the transition metals are 3d-series ( to ), 4d series ( to ) and 5d-series. (La, Hf to ) Statement B : The two series of the inner transition metals (4f and ) are known as actinoids and lanthanoids, respectively.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The three main series of the transition metals are series (), series ( ) and series (La to omitting to ). The fourth series [ Ac, to ]. The two series of the inner-transition metals, (4f and 5f) are known as lanthanoids and actinoids respectively.
CHXII08:THE D- & F-BLOCK ELEMENTS
321581
The elements in which differentiating electrons are progressively filled in orbital are called
321578
Which of the following elements belongs to actinoid series ?
1 La
2
3
4
Explanation:
Th is an actinoid.
CHXII08:THE D- & F-BLOCK ELEMENTS
321579
Europium is
1 s-block element
2 p-block element
3 d-block element
4 f-block element
Explanation:
Europium (atomic number 53) belongs to lanthanide series of f-block. Its electronic configuration is
CHXII08:THE D- & F-BLOCK ELEMENTS
321580
Statement A : The three series of the transition metals are 3d-series ( to ), 4d series ( to ) and 5d-series. (La, Hf to ) Statement B : The two series of the inner transition metals (4f and ) are known as actinoids and lanthanoids, respectively.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
The three main series of the transition metals are series (), series ( ) and series (La to omitting to ). The fourth series [ Ac, to ]. The two series of the inner-transition metals, (4f and 5f) are known as lanthanoids and actinoids respectively.
CHXII08:THE D- & F-BLOCK ELEMENTS
321581
The elements in which differentiating electrons are progressively filled in orbital are called
