Explain the rule with example according to which electrons are filled in various energy levels.

Neil Bohr and Charles Bury proposed a scheme for distribution of electrons in different shells of an atom based on the formula 2n 2 , where n denotes the number of shell. The following rules are followed for writing the number of electrons in different energy levels or shells: 1. The maximum number of electrons in each shell or orbit is determined by the formula 2n 2 , where n is the number of shell. K shell, n=1, no. of electrons = 2 x 1 2 = 2 L shell, n=2, no. of electrons = 2 x 2 2 = 8 M shell, n=3, no. of electrons = 2 x 3 2 = 18 2. Electrons are not accommodated in a given shell, unless the inner shells are filled. Shells are filled in step-wise manner. 3. If the atom has only one shell, the outermost shell must have 2 electrons to achieve stable electronic configuration. This is called the duplet rule . If the atom has more than one shell, then its outermost shell must have 8 electrons to achieve stable electronic configuration. This is called the octet rule . Example: Potassium has 19 electrons. The first shell will take 2 electrons, second shell will take 8 electrons. Remaining 9 electrons should be taken by third shell but according to octet rule, the outermost shell should not accommodate more than 8 electrons. So third shell take 8 electrons and remaining 1 electron will go to fourth shell. So electronic configuration of potassium is:

What is valency ? Name two elements having variable valency and state their valencies.

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State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
(a) ¹²C₆
(b) ¹⁶O₈
(c) ¹⁹F₉
(d) ²⁰Ne₁₀
(e) ²⁷Al₁₃
(f) ³⁵Cl₁₇
Also, draw atomic diagrams for each of them.

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Draw the diagrams representing the atomic structures of the following:
(a) Nitrogen
(b) Neon

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Complete the table below by identifying A, B, C, D, E and F.
Element Symbol Number of protons Number of neutrons Number of electrons
Fluorine ₉F¹⁹ 9 A B
Aluminium C D 14 13
Potassium ₁₉K³⁹ E F 19

Element	Symbol	Number of protons	Number of neutrons	Number of electrons
Fluorine	₉F¹⁹	9	A	B
Aluminium	C	D	14	13
Potassium	₁₉K³⁹	E	F	19

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Chemistry

Explain the rule with example according to which electrons are filled in various energy levels.

Atomic Structure

Related Questions

What is valency ? Name two elements having variable valency and state their valencies.

State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
(a) ¹²C₆
(b) ¹⁶O₈
(c) ¹⁹F₉
(d) ²⁰Ne₁₀
(e) ²⁷Al₁₃
(f) ³⁵Cl₁₇
Also, draw atomic diagrams for each of them.

Draw the diagrams representing the atomic structures of the following:
(a) Nitrogen
(b) Neon

Complete the table below by identifying A, B, C, D, E and F.
Element Symbol Number of protons Number of neutrons Number of electrons
Fluorine ₉F¹⁹ 9 A B
Aluminium C D 14 13
Potassium ₁₉K³⁹ E F 19

Chemistry

Explain the rule with example according to which electrons are filled in various energy levels.

Atomic Structure

Related Questions

What is valency ? Name two elements having variable valency and state their valencies.

State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.(a) 12C6(b) 16O8(c) 19F9(d) 20Ne10(e) 27Al13(f) 35Cl17Also, draw atomic diagrams for each of them.

Draw the diagrams representing the atomic structures of the following:(a) Nitrogen(b) Neon

Complete the table below by identifying A, B, C, D, E and F.ElementSymbolNumber of protonsNumber of neutronsNumber of electronsFluorine9F199ABAluminiumCD1413Potassium19K39EF19

State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
(a) ¹²C₆
(b) ¹⁶O₈
(c) ¹⁹F₉
(d) ²⁰Ne₁₀
(e) ²⁷Al₁₃
(f) ³⁵Cl₁₇
Also, draw atomic diagrams for each of them.

Draw the diagrams representing the atomic structures of the following:
(a) Nitrogen
(b) Neon

Complete the table below by identifying A, B, C, D, E and F.
Element Symbol Number of protons Number of neutrons Number of electrons
Fluorine ₉F¹⁹ 9 A B
Aluminium C D 14 13
Potassium ₁₉K³⁹ E F 19