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Home /Doubts and Solutions/CBSE/Class 9/Chemistry/Structure Of The Atom/Distribution Of Electrons In Orbits

Distribution Of Electrons In Orbits Free Doubts and Solutions

CBSE - IX - Chemistry - Structure of the Atom

Write electonic configuration of first 50 elements.

Asked by Vishalgarg1234 25th November 2018, 3:21 PM
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CBSE - IX - Chemistry - Structure of the Atom

sir please explain how we find valence of elements

Asked by sshivali3333 19th September 2018, 11:06 AM
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CBSE - IX - Chemistry - Structure of the Atom

The orbital naming starts from K. Why?
 

Asked by aahnik.mohanty 5th November 2017, 8:21 AM
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CBSE - IX - Chemistry - Structure of the Atom

in phosphuros it can either loose 5 electrons or gain 3 electrons . why can't we do the same in nitrogen?

Asked by meghanavincent25 27th October 2017, 9:28 PM
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CBSE - IX - Chemistry - Structure of the Atom

I want the symbol,number of protons,number of neutrons,number of electrons,distribution of electrons and valency of the first 30 elements 

Asked by sunipa1971 29th May 2017, 10:36 AM
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CBSE - IX - Chemistry - Structure of the Atom

how can we find electrons if proton and neutron are given
 

Asked by Pooja 13th March 2017, 12:29 PM
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CBSE - IX - Chemistry - Structure of the Atom

why only 8 valence electrons is needed in element to be stable,and what do mean by stability of atom?

Asked by abinash.gupta003 12th March 2017, 5:14 PM
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CBSE - IX - Chemistry - Structure of the Atom

An atom of an element ‘X’ has 3 orbits around its nucleus. What is its maximum electron holding capacity?

Asked by gpnkumar0 11th March 2017, 12:30 PM
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CBSE - IX - Chemistry - Structure of the Atom

what is difference between losing and sharing and gaining electron ?explain each of three with two-two example. 

Asked by abinash.gupta003 10th March 2017, 12:05 PM
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CBSE - IX - Chemistry - Structure of the Atom

What is covalency?  Explain the formation of covalent bond with the help of an example.

Asked by Topperlearning User 4th April 2016, 10:23 AM
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CBSE - IX - Chemistry - Structure of the Atom

What is electrovalency?  Explain the formation of electrovalent bond with the help of an example.

Asked by Topperlearning User 4th April 2016, 10:20 AM
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CBSE - IX - Chemistry - Structure of the Atom

Define: (1) Electronic Configuration (2) Valency (3) Valence Shell (4) Valence Electrons (5) Noble Gases (Note: Each question carries 2 Marks)    

Asked by Topperlearning User 4th April 2016, 10:17 AM
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CBSE - IX - Chemistry - Structure of the Atom

Explain octet rule.

Asked by Topperlearning User 4th April 2016, 10:10 AM
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CBSE - IX - Chemistry - Structure of the Atom

  What did Bohr contribute to the atomic structure? Describe Bohr's model of an atom in detail with the help of a neat and labelled diagram.  

Asked by Topperlearning User 4th April 2016, 10:06 AM
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CBSE - IX - Chemistry - Structure of the Atom

(i) Define valency by taking the examples of magnesium (At. no. = 12) and oxygen (At. no. = 8) (ii) S-2 has completely filled K, L and M shells. Find its atomic number.  

Asked by Topperlearning User 4th April 2016, 10:02 AM
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CBSE - IX - Chemistry - Structure of the Atom

Explain the rules for distribution of electrons into different shells of an atom suggested by Bohr and Bury.

Asked by Topperlearning User 4th April 2016, 10:01 AM
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CBSE - IX - Chemistry - Structure of the Atom

(a) Draw a sketch of Bohr's model of an atom with three shells.(b) If K, L and M shell of an atom are full, then what would be the total number of electrons in the atom? (c) What is the maximum number of electrons that can be accommodated in a shell?

Asked by Topperlearning User 4th April 2016, 10:00 AM
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CBSE - IX - Chemistry - Structure of the Atom

(a) Explain Bohr and Bury rules for distribution of electrons into different shells. (b) Draw the electronic structure of element X with atomic number 17 and element Y with atomic number 16?

Asked by Topperlearning User 30th March 2016, 5:56 PM
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CBSE - IX - Chemistry - Structure of the Atom

According to Bohr and Bury Scheme what is the maximum number of electrons present in Marshall of an atom?

Asked by ca.anshu.g 14th March 2016, 4:54 PM
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CBSE - IX - Chemistry - Structure of the Atom

Please do a favour.Explain covalency and electrovalency in simple language as i am not getting the bookish language.

Asked by Harshita Singh 10th March 2016, 9:10 PM
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CBSE - IX - Chemistry - Structure of the Atom

ACCORDING TO THE BOHR'S MODEL,THE SHELLS OF AN ATOM ARE NAMED BY K,L,M,N... WHY IS IT SO?

Asked by yuthikasharma75 22nd February 2016, 6:35 PM
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CBSE - IX - Chemistry - Structure of the Atom

i have a doubt in electronic configuration of atom.in the electronic configuration of calcium it is =2,8,8,2.as in the m shell the maximum no of electrons that can be accomadated will be 18 electrons.so why the electronic configuration cannot be for calcium as =2,8,10

Asked by my3shyll 2nd January 2016, 11:13 AM
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CBSE - IX - Chemistry - Structure of the Atom

Show the diagrammatically the  electron distribution in a sodium atom and a sodium ion  and also give their  atomic no.?

Asked by Parul 30th December 2015, 4:04 PM
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CBSE - IX - Chemistry - Structure of the Atom

NUMBER of proton ,neutron and electron in four  species A,B,C AND D  are respectively 6,6,6;7,7,7;6.8.6 and 9,10,10. Give symbolic representation of each species and tell which of them are isotopes and  which are isobar?
 
 
 

Asked by Parul 30th December 2015, 4:00 PM
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CBSE - IX - Chemistry - Structure of the Atom

how can we calculate the valency of elements having atomic number from 24-118

Asked by sanjeev.mami 25th December 2015, 10:44 AM
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CBSE - IX - Chemistry - Structure of the Atom

Is the energy level (shell) of an electron related to the time it take to orbit the nucleus of an atom

Asked by JAGGUHOODA2064 30th October 2015, 8:22 PM
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CBSE - IX - Chemistry - Structure of the Atom

(a) Draw a sketch of Bohr's model of an atom with two shells completely filled with electrons. (b) Name sub-atomic particles of an atom with (i) positive charge (ii) without any charge. (c)What is the valency of Aluminium whose atomic number is 13? Give reason.

Asked by Topperlearning User 5th May 2015, 10:55 AM
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CBSE - IX - Chemistry - Structure of the Atom

Write the electronic configuration for an atom whose atomic number is 11 and mass number 23, show it by drawing a figure.

Asked by Topperlearning User 5th May 2015, 10:50 AM
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CBSE - IX - Chemistry - Structure of the Atom

Draw the atomic structure of an atom whose K and L shells are full.

Asked by Topperlearning User 5th May 2015, 10:45 AM
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CBSE - IX - Chemistry - Structure of the Atom

How do atoms share elctrons with each other?

Asked by kumar.ashlesha 23rd March 2015, 7:50 PM
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CBSE - IX - Chemistry - Structure of the Atom

You are given an element begin mathsize 12px style straight X presubscript 8 presuperscript 16 end style. Find out

(a)Number of protons, electrons and neutrons in 'X'.

(b) Valency of 'X'.

Asked by Topperlearning User 16th March 2015, 5:16 PM
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CBSE - IX - Chemistry - Structure of the Atom

Explain distribution of electrons in different shells with examples.

Asked by singhaivk05 27th January 2015, 6:59 PM
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CBSE - IX - Chemistry - Structure of the Atom

What do you understand by combining capacity of the atoms? Explain with examples.

Asked by Topperlearning User 23rd January 2015, 3:45 PM
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CBSE - IX - Chemistry - Structure of the Atom

State the postulates put forward by Neil's Bohr about the model of an atom. Draw a diagram to show the arrangement of energy levels in an atom.

Asked by Topperlearning User 22nd January 2015, 3:38 PM
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CBSE - IX - Chemistry - Structure of the Atom

the question is to write the electronic configuration of 4020Ca.
and the solution given was- Electronic configuration of calcium (Ca) with atomic number 20 is 2, 8, 8, 2.
why isnt it 2,8,10and valency=2 when the capacity of m shell is 18?

Asked by sharma.rashi102 24th December 2014, 2:34 PM
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CBSE - IX - Chemistry - Structure of the Atom

Write the electronic configuration of an atom with atomic number 6.

Asked by Topperlearning User 19th November 2014, 3:28 PM
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CBSE - IX - Chemistry - Structure of the Atom

Draw a sketch of Bohr's model of an atom with atomic number 15.

Asked by Topperlearning User 19th November 2014, 12:58 PM
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CBSE - IX - Chemistry - Structure of the Atom

What is the significance of electronic configuration of an atom?

Asked by Topperlearning User 26th August 2014, 3:50 PM
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CBSE - IX - Chemistry - Structure of the Atom

Explain the distribution of electrons in sulphur. (Atomic number = 16).

Asked by Topperlearning User 26th August 2014, 3:48 PM
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CBSE - IX - Chemistry - Structure of the Atom

Write the distribution of electrons in helium and hydrogen atoms.

Asked by Topperlearning User 26th August 2014, 3:17 PM
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CBSE - IX - Chemistry - Structure of the Atom

Explain if electrons and protons in an atom is 4 then: (i) What is the atomic number of the atom? (ii) What is the charge on the atom?

Asked by Topperlearning User 26th August 2014, 3:16 PM
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CBSE - IX - Chemistry - Structure of the Atom

Give the schematic atomic structures of chlorine atom and chloride ion.

Asked by Topperlearning User 26th August 2014, 2:35 PM
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CBSE - IX - Chemistry - Structure of the Atom

An elements has mass number 35 and atomic number 17, find: (i) Electronic configuration of an atom. (ii) The number of electrons in the outermost shell.

Asked by Topperlearning User 26th August 2014, 2:34 PM
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CBSE - IX - Chemistry - Structure of the Atom

An element 'X' has a mass number 4 and atomic number 2. Find the valency of 'X'.

Asked by Topperlearning User 16th July 2014, 1:06 PM
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CBSE - IX - Chemistry - Structure of the Atom

The atomic number and mass number of an element are 16 and 32 respectively. (a)Find the number of protons, electrons and neutrons in it. (b)State its valency. (c)Is this element a metal or a non - metal? Justify your answer.

Asked by Topperlearning User 13th May 2014, 2:02 PM
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CBSE - IX - Chemistry - Structure of the Atom

Can electrons be arranged in second shell or L shell without filling the first shell or K shell?

Asked by Topperlearning User 13th May 2014, 2:01 PM
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CBSE - IX - Chemistry - Structure of the Atom

According to Bohr-Bury rules, what are the conditions for the filling of electrons in: i. A new shell ii. A penultimate shell and outermost shell

Asked by Topperlearning User 13th May 2014, 1:15 PM
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CBSE - IX - Chemistry - Structure of the Atom

What are valence electrons?

Asked by Topperlearning User 13th May 2014, 1:05 PM
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CBSE - IX - Chemistry - Structure of the Atom

What is the significance of valence electrons?

Asked by Topperlearning User 13th May 2014, 1:03 PM
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CBSE - IX - Chemistry - Structure of the Atom

If electrons are to be accommodated in K and L shell respectively, in which shell will the electrons enter first?

Asked by Topperlearning User 13th May 2014, 12:55 PM
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CBSE - IX - Chemistry - Structure of the Atom

a. Define electronic configuration. Arrange the various energy shells in order of increasing energy. b. What is the maximum number of electrons that can be accomodated in a: i. Penultimate shell ii. N shell

Asked by Topperlearning User 13th May 2014, 12:52 PM
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CBSE - IX - Chemistry - Structure of the Atom

What are energy levels? How are they designated?

Asked by Topperlearning User 13th May 2014, 12:50 PM
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CBSE - IX - Chemistry - Structure of the Atom

According to Bohr model of an atom, what is the location of electrons and protons in an atom?

Asked by Topperlearning User 13th May 2014, 12:49 PM
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