Mendeleev’s periodic table was based on the observation that the properties of elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then their properties get repeated after regular intervals. For more answerRead more
Mendeleev’s periodic table was based on the observation that the properties of elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then their properties get repeated after regular intervals.
K is in group 1. Therefore, the oxide will be K₂O. C is in group 4. Therefore, the oxide will be CO₂. Al is in group 3. Therefore, the oxide will be Al₂O₃. Si is in group 4. Therefore, the oxide will be SiO₂. Ba is in group 2. Therefore, the oxide will be BaO. For more answers visit to website: httpRead more
K is in group 1. Therefore, the oxide will be K₂O.
C is in group 4. Therefore, the oxide will be CO₂.
Al is in group 3. Therefore, the oxide will be Al₂O₃.
Si is in group 4. Therefore, the oxide will be SiO₂.
Ba is in group 2. Therefore, the oxide will be BaO.
Limitations of Newlands’ law of octaves: a) It was not applicable throughout the arrangements. It was applicable up to calcium only. The properties of the elements listed after calcium showed no resemblance to the properties of the elements above them. b) Those elements that were discovered after NeRead more
Limitations of Newlands’ law of octaves:
a) It was not applicable throughout the arrangements. It was applicable up to calcium
only. The properties of the elements listed after calcium showed no resemblance
to the properties of the elements above them.
b) Those elements that were discovered after Newlands’ octaves did not follow the
law of octaves.
c) The position of cobalt and nickel in the group of the elements (F, Cl) of different
properties could not be explained.
d) Placing of iron far away from cobalt and nickel, which have similar properties as
iron, could also not be explained.
Limitation of Dobereiner’s classification: All known elements could not be classified into groups of triads on the basis of their properties. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Limitation of Dobereiner’s classification:
All known elements could not be classified into groups of triads on the basis of their
properties.
What were the criteria used by Mendeleev in creating his Periodic Table?
Mendeleev’s periodic table was based on the observation that the properties of elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then their properties get repeated after regular intervals. For more answerRead more
Mendeleev’s periodic table was based on the observation that the properties of elements are a periodic function of their atomic masses. This means that if elements are arranged in the increasing order of their atomic masses, then their properties get repeated after regular intervals.
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Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
Scandium and germanium For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Scandium and germanium
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Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K, C, AI, Si, Ba.
K is in group 1. Therefore, the oxide will be K₂O. C is in group 4. Therefore, the oxide will be CO₂. Al is in group 3. Therefore, the oxide will be Al₂O₃. Si is in group 4. Therefore, the oxide will be SiO₂. Ba is in group 2. Therefore, the oxide will be BaO. For more answers visit to website: httpRead more
K is in group 1. Therefore, the oxide will be K₂O.
C is in group 4. Therefore, the oxide will be CO₂.
Al is in group 3. Therefore, the oxide will be Al₂O₃.
Si is in group 4. Therefore, the oxide will be SiO₂.
Ba is in group 2. Therefore, the oxide will be BaO.
For more answers visit to website:
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What were the limitations of Newlands’ Law of Octaves?
Limitations of Newlands’ law of octaves: a) It was not applicable throughout the arrangements. It was applicable up to calcium only. The properties of the elements listed after calcium showed no resemblance to the properties of the elements above them. b) Those elements that were discovered after NeRead more
Limitations of Newlands’ law of octaves:
a) It was not applicable throughout the arrangements. It was applicable up to calcium
only. The properties of the elements listed after calcium showed no resemblance
to the properties of the elements above them.
b) Those elements that were discovered after Newlands’ octaves did not follow the
law of octaves.
c) The position of cobalt and nickel in the group of the elements (F, Cl) of different
properties could not be explained.
d) Placing of iron far away from cobalt and nickel, which have similar properties as
iron, could also not be explained.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
What were the limitations of Döbereiner’s classification?
Limitation of Dobereiner’s classification: All known elements could not be classified into groups of triads on the basis of their properties. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Limitation of Dobereiner’s classification:
All known elements could not be classified into groups of triads on the basis of their
properties.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/