Two isotopes of carbon are ¹²₆𝐶 and ¹⁴₆𝐶 The electronic configuration of ¹²₆𝐶 is 2, 4. The electronic configuration of ¹⁴₆𝐶 is 2, 4. [Isotopes have same electronic configuration] ⁴⁰₂₉𝐶𝑎 and ⁴⁰₁₈𝐴𝑟 are a pair of isobars The electronic configuration of ⁴⁰₂₉𝐶𝑎 is 2, 8, 8, 2 The electronic configurationRead more
Two isotopes of carbon are ¹²₆𝐶 and ¹⁴₆𝐶
The electronic configuration of ¹²₆𝐶 is 2, 4.
The electronic configuration of ¹⁴₆𝐶 is 2, 4.
[Isotopes have same electronic configuration]
⁴⁰₂₉𝐶𝑎 and ⁴⁰₁₈𝐴𝑟 are a pair of isobars
The electronic configuration of ⁴⁰₂₉𝐶𝑎 is 2, 8, 8, 2
The electronic configuration of ⁴⁰₁₈𝐴𝑟 is 2, 8, 8.
[Isobars have different electronic configuration]
Symbol Proton Neutron Electron H 1 0 1 D 1 1 1 For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
Mass number of oxygen = Number of protons + Number of neutrons = 8 + 8 = 16 Mass number of sulphur = Number of protons + Number of neutrons = 16 +16 = 32 For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
Mass number of oxygen = Number of protons + Number of neutrons
= 8 + 8
= 16
Mass number of sulphur = Number of protons + Number of neutrons
= 16 +16
= 32
(i) The atomic number is equal to the number of protons. Therefore, the atomic number of the atom is 8. (ii) Since the number of both electrons and protons is equal, therefore, the charge on the atom is 0. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/scienRead more
(i) The atomic number is equal to the number of protons. Therefore, the atomic number of
the atom is 8.
(ii) Since the number of both electrons and protons is equal, therefore, the charge on the
atom is 0.
If the number of electrons in the outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell. On the other hand, if the number of electrons in the outermost shell of the atom of an element is greateRead more
If the number of electrons in the outermost shell of the atom of an element is less than or equal to
4, then the valency of the element is equal to the number of electrons in the outermost shell.
On the other hand, if the number of electrons in the outermost shell of the atom of an element is greater than 4, then the valency of that element is determined by subtracting the number of electrons in the outermost shell from 8.
The distribution of electrons in chlorine, sulphur, and magnesium atoms are 2, 8, 7; 2, 8, 6 and 2, 8, 2 respectively. Therefore, the number of electrons in the outer most shell of chlorine, sulphur, and magnesium atoms are 7, 6, and 2 respectively.
Thus,
The valency of chlorine = 8 −7 = 1
The valency of sulphur = 8 − 6 = 2
The valency of magnesium = 2
Write the electronic configuration of any one pair of isotopes and isobars.
Two isotopes of carbon are ¹²₆𝐶 and ¹⁴₆𝐶 The electronic configuration of ¹²₆𝐶 is 2, 4. The electronic configuration of ¹⁴₆𝐶 is 2, 4. [Isotopes have same electronic configuration] ⁴⁰₂₉𝐶𝑎 and ⁴⁰₁₈𝐴𝑟 are a pair of isobars The electronic configuration of ⁴⁰₂₉𝐶𝑎 is 2, 8, 8, 2 The electronic configurationRead more
Two isotopes of carbon are ¹²₆𝐶 and ¹⁴₆𝐶
The electronic configuration of ¹²₆𝐶 is 2, 4.
The electronic configuration of ¹⁴₆𝐶 is 2, 4.
[Isotopes have same electronic configuration]
⁴⁰₂₉𝐶𝑎 and ⁴⁰₁₈𝐴𝑟 are a pair of isobars
The electronic configuration of ⁴⁰₂₉𝐶𝑎 is 2, 8, 8, 2
The electronic configuration of ⁴⁰₁₈𝐴𝑟 is 2, 8, 8.
[Isobars have different electronic configuration]
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For the symbol H,D and T tabulate three sub-atomic particles found in each of them.
Symbol Proton Neutron Electron H 1 0 1 D 1 1 1 For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
Symbol Proton Neutron Electron
H 1 0 1
D 1 1 1
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With the help of Table 4.1, find out the mass number of oxygen and Sulphur atom.
Mass number of oxygen = Number of protons + Number of neutrons = 8 + 8 = 16 Mass number of sulphur = Number of protons + Number of neutrons = 16 +16 = 32 For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
Mass number of oxygen = Number of protons + Number of neutrons
= 8 + 8
= 16
Mass number of sulphur = Number of protons + Number of neutrons
= 16 +16
= 32
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If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?
(i) The atomic number is equal to the number of protons. Therefore, the atomic number of the atom is 8. (ii) Since the number of both electrons and protons is equal, therefore, the charge on the atom is 0. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/scienRead more
(i) The atomic number is equal to the number of protons. Therefore, the atomic number of
the atom is 8.
(ii) Since the number of both electrons and protons is equal, therefore, the charge on the
atom is 0.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
How will you find the valency of chlorine, Sulphur and magnesium?
If the number of electrons in the outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell. On the other hand, if the number of electrons in the outermost shell of the atom of an element is greateRead more
If the number of electrons in the outermost shell of the atom of an element is less than or equal to
4, then the valency of the element is equal to the number of electrons in the outermost shell.
On the other hand, if the number of electrons in the outermost shell of the atom of an element is greater than 4, then the valency of that element is determined by subtracting the number of electrons in the outermost shell from 8.
The distribution of electrons in chlorine, sulphur, and magnesium atoms are 2, 8, 7; 2, 8, 6 and 2, 8, 2 respectively. Therefore, the number of electrons in the outer most shell of chlorine, sulphur, and magnesium atoms are 7, 6, and 2 respectively.
Thus,
The valency of chlorine = 8 −7 = 1
The valency of sulphur = 8 − 6 = 2
The valency of magnesium = 2
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/