Chloride formulas (i) Eka - Aluminium = \({\rm{GaC}}{{\rm{l}}_{\rm{3}}}\,\left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) (ii) Eka - Silicon = \({\rm{GeC}}{{\rm{l}}_{\rm{4}}}{\mkern 1mu} \left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) Mendeleev arranged elements in horizontal rows and vertical columns of a table in order to their increasing atomic weights.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313055
The atomic weights of “Be” and “In” were corrected by Mendeleev using the formula
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313056
Statement A : Mendeleev’s left the gap under aluminium and silicon and called these elements Eka-aluminium and Eka-silicon, respectively. Statement B : Dobereiner arranged elements on the basis of increasing atomic number.
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:
Both gallium and germanium were unknown at the time Mendeleev published his periodic table. He left the gap under aluminium and a gap under silicon and called these elements Eka_x0002_aluminium and Eka-silicon. Dobereiner arranged elements on the basis of increasing atomic weights. So, the option (4) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313057
Which of the following set of elements obeys Newland’s octave rule?
1 Na, K, Rb
2 Mg, Ca, Sr
3 Cl,Br, I
4 Be, Mg, Ca
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313058
The discovery of which of the following group of elements gave a death blow to the Newland Law of Octaves.
1 Inert gases
2 Alkaline earths
3 Rare earths
4 Actinides
Explanation:
With the discovery of inert gases (Group zero in Mendeleev’s periodic table), the law of octaves lost its original significance since it was now the nineth element which had properties similar to the first one.
Chloride formulas (i) Eka - Aluminium = \({\rm{GaC}}{{\rm{l}}_{\rm{3}}}\,\left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) (ii) Eka - Silicon = \({\rm{GeC}}{{\rm{l}}_{\rm{4}}}{\mkern 1mu} \left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) Mendeleev arranged elements in horizontal rows and vertical columns of a table in order to their increasing atomic weights.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313055
The atomic weights of “Be” and “In” were corrected by Mendeleev using the formula
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313056
Statement A : Mendeleev’s left the gap under aluminium and silicon and called these elements Eka-aluminium and Eka-silicon, respectively. Statement B : Dobereiner arranged elements on the basis of increasing atomic number.
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:
Both gallium and germanium were unknown at the time Mendeleev published his periodic table. He left the gap under aluminium and a gap under silicon and called these elements Eka_x0002_aluminium and Eka-silicon. Dobereiner arranged elements on the basis of increasing atomic weights. So, the option (4) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313057
Which of the following set of elements obeys Newland’s octave rule?
1 Na, K, Rb
2 Mg, Ca, Sr
3 Cl,Br, I
4 Be, Mg, Ca
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313058
The discovery of which of the following group of elements gave a death blow to the Newland Law of Octaves.
1 Inert gases
2 Alkaline earths
3 Rare earths
4 Actinides
Explanation:
With the discovery of inert gases (Group zero in Mendeleev’s periodic table), the law of octaves lost its original significance since it was now the nineth element which had properties similar to the first one.
Chloride formulas (i) Eka - Aluminium = \({\rm{GaC}}{{\rm{l}}_{\rm{3}}}\,\left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) (ii) Eka - Silicon = \({\rm{GeC}}{{\rm{l}}_{\rm{4}}}{\mkern 1mu} \left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) Mendeleev arranged elements in horizontal rows and vertical columns of a table in order to their increasing atomic weights.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313055
The atomic weights of “Be” and “In” were corrected by Mendeleev using the formula
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313056
Statement A : Mendeleev’s left the gap under aluminium and silicon and called these elements Eka-aluminium and Eka-silicon, respectively. Statement B : Dobereiner arranged elements on the basis of increasing atomic number.
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:
Both gallium and germanium were unknown at the time Mendeleev published his periodic table. He left the gap under aluminium and a gap under silicon and called these elements Eka_x0002_aluminium and Eka-silicon. Dobereiner arranged elements on the basis of increasing atomic weights. So, the option (4) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313057
Which of the following set of elements obeys Newland’s octave rule?
1 Na, K, Rb
2 Mg, Ca, Sr
3 Cl,Br, I
4 Be, Mg, Ca
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313058
The discovery of which of the following group of elements gave a death blow to the Newland Law of Octaves.
1 Inert gases
2 Alkaline earths
3 Rare earths
4 Actinides
Explanation:
With the discovery of inert gases (Group zero in Mendeleev’s periodic table), the law of octaves lost its original significance since it was now the nineth element which had properties similar to the first one.
Chloride formulas (i) Eka - Aluminium = \({\rm{GaC}}{{\rm{l}}_{\rm{3}}}\,\left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) (ii) Eka - Silicon = \({\rm{GeC}}{{\rm{l}}_{\rm{4}}}{\mkern 1mu} \left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) Mendeleev arranged elements in horizontal rows and vertical columns of a table in order to their increasing atomic weights.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313055
The atomic weights of “Be” and “In” were corrected by Mendeleev using the formula
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313056
Statement A : Mendeleev’s left the gap under aluminium and silicon and called these elements Eka-aluminium and Eka-silicon, respectively. Statement B : Dobereiner arranged elements on the basis of increasing atomic number.
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:
Both gallium and germanium were unknown at the time Mendeleev published his periodic table. He left the gap under aluminium and a gap under silicon and called these elements Eka_x0002_aluminium and Eka-silicon. Dobereiner arranged elements on the basis of increasing atomic weights. So, the option (4) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313057
Which of the following set of elements obeys Newland’s octave rule?
1 Na, K, Rb
2 Mg, Ca, Sr
3 Cl,Br, I
4 Be, Mg, Ca
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313058
The discovery of which of the following group of elements gave a death blow to the Newland Law of Octaves.
1 Inert gases
2 Alkaline earths
3 Rare earths
4 Actinides
Explanation:
With the discovery of inert gases (Group zero in Mendeleev’s periodic table), the law of octaves lost its original significance since it was now the nineth element which had properties similar to the first one.
Chloride formulas (i) Eka - Aluminium = \({\rm{GaC}}{{\rm{l}}_{\rm{3}}}\,\left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) (ii) Eka - Silicon = \({\rm{GeC}}{{\rm{l}}_{\rm{4}}}{\mkern 1mu} \left( {{\rm{EC}}{{\rm{l}}_{\rm{3}}}} \right)\) Mendeleev arranged elements in horizontal rows and vertical columns of a table in order to their increasing atomic weights.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313055
The atomic weights of “Be” and “In” were corrected by Mendeleev using the formula
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313056
Statement A : Mendeleev’s left the gap under aluminium and silicon and called these elements Eka-aluminium and Eka-silicon, respectively. Statement B : Dobereiner arranged elements on the basis of increasing atomic number.
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:
Both gallium and germanium were unknown at the time Mendeleev published his periodic table. He left the gap under aluminium and a gap under silicon and called these elements Eka_x0002_aluminium and Eka-silicon. Dobereiner arranged elements on the basis of increasing atomic weights. So, the option (4) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313057
Which of the following set of elements obeys Newland’s octave rule?
1 Na, K, Rb
2 Mg, Ca, Sr
3 Cl,Br, I
4 Be, Mg, Ca
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313058
The discovery of which of the following group of elements gave a death blow to the Newland Law of Octaves.
1 Inert gases
2 Alkaline earths
3 Rare earths
4 Actinides
Explanation:
With the discovery of inert gases (Group zero in Mendeleev’s periodic table), the law of octaves lost its original significance since it was now the nineth element which had properties similar to the first one.
