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.
The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2). For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
The element with atomic number 12 has same chemical properties as that of calcium.
This is because both of them have same number of valence electrons (2).
In the modern periodic table, atoms with similar electronic configurations are placed in the same column. In a group, the number of valence electrons remains the same. Elements across a period show an increase in the number of valence electrons. For more answers visit to website: https://www.tiwariaRead more
In the modern periodic table, atoms with similar electronic configurations are placed in the
same column. In a group, the number of valence electrons remains the same. Elements
across a period show an increase in the number of valence electrons.
(a) The atomic number of this element is 17. (b) It would be chemically similar to F(9) with configuration as 2, 7. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
(a) The atomic number of this element is 17.
(b) It would be chemically similar to F(9) with configuration as 2, 7.
All the elements in the same column as fluorine have the same number of valence electrons (7). Hence, they all have valency equal to 1. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
All the elements in the same column as fluorine have the same number of valence
electrons (7). Hence, they all have valency equal to 1.
All the elements in the same column as boron have the same number of valence electrons (3). Hence, they all have valency equal to 3. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
All the elements in the same column as boron have the same number of valence
electrons (3). Hence, they all have valency equal to 3.
(a) Neon has two shells, both of which are completely filled with electrons (2 electrons in K shell and 8 electrons in L shell). (b) Magnesium has the electronic configuration 2, 8, 2. (c) Silicon has a total of three shells, with four electrons in its valence shell (2 electrons in K shell, 8 electrRead more
(a) Neon has two shells, both of which are completely filled with electrons (2 electrons in
K shell and 8 electrons in L shell).
(b) Magnesium has the electronic configuration 2, 8, 2.
(c) Silicon has a total of three shells, with four electrons in its valence shell (2 electrons
in K shell, 8 electrons in L shell and 4 electrons in M shell).
(d) Boron has a total of two shells, with three electrons in its valence shell (2 electrons in
K shell and 3 electrons in L shell).
(e) Carbon has twice as many electrons in its second shell as in its first shell (2 electrons
in K shell and 4 electrons in L shell).
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/cRead more
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides.
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/
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?
The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2). For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
The element with atomic number 12 has same chemical properties as that of calcium.
This is because both of them have same number of valence electrons (2).
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
In the modern periodic table, atoms with similar electronic configurations are placed in the same column. In a group, the number of valence electrons remains the same. Elements across a period show an increase in the number of valence electrons. For more answers visit to website: https://www.tiwariaRead more
In the modern periodic table, atoms with similar electronic configurations are placed in the
same column. In a group, the number of valence electrons remains the same. Elements
across a period show an increase in the number of valence electrons.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?
(a) The atomic number of this element is 17. (b) It would be chemically similar to F(9) with configuration as 2, 7. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
(a) The atomic number of this element is 17.
(b) It would be chemically similar to F(9) with configuration as 2, 7.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
What property do all elements in the same column of the Periodic Table as fluorine have in common?
All the elements in the same column as fluorine have the same number of valence electrons (7). Hence, they all have valency equal to 1. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
All the elements in the same column as fluorine have the same number of valence
electrons (7). Hence, they all have valency equal to 1.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
What property do all elements in the same column of the Periodic Table as boron have in common ?
All the elements in the same column as boron have the same number of valence electrons (3). Hence, they all have valency equal to 3. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
All the elements in the same column as boron have the same number of valence
electrons (3). Hence, they all have valency equal to 3.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Which element has
(a) Neon has two shells, both of which are completely filled with electrons (2 electrons in K shell and 8 electrons in L shell). (b) Magnesium has the electronic configuration 2, 8, 2. (c) Silicon has a total of three shells, with four electrons in its valence shell (2 electrons in K shell, 8 electrRead more
(a) Neon has two shells, both of which are completely filled with electrons (2 electrons in
K shell and 8 electrons in L shell).
(b) Magnesium has the electronic configuration 2, 8, 2.
(c) Silicon has a total of three shells, with four electrons in its valence shell (2 electrons
in K shell, 8 electrons in L shell and 4 electrons in M shell).
(d) Boron has a total of two shells, with three electrons in its valence shell (2 electrons in
K shell and 3 electrons in L shell).
(e) Carbon has twice as many electrons in its second shell as in its first shell (2 electrons
in K shell and 4 electrons in L shell).
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-5/
Give reasons: Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/cRead more
Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-4/