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• CBSE×
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• Structure Of The Atom×
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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

## Write electonic configuration of first 50 elements.

Asked by Vishalgarg1234 25th November 2018, 3:21 PM

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## How can i know the valency of a compond to react it with another elemet to form a chemical reaction? For example - Suppose I have to make . Then i have to first react Carbon with Oxygen then react that compond with calcium. So how will i know the valency of compound formed from reaction of carbon with oxygen. We can know the valency of elements from their atomic number and electronic configuration, but how can i know the valency of compound?  Please help,waiting for your reply, Thank you.

Asked by hk.sachdev 12th October 2018, 10:38 PM

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## sir please explain how we find valence of elements

Asked by sshivali3333 19th September 2018, 11:06 AM

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## Q) In an atom the maximum number of electrons in the outermost shell is 8 and the electrons cannot be furthur placed in a new shell unless the previous shell is filled completely. Then the maximum number of electrons in the third shell should be 8 ,as it becomes the outermost shell at that time because unless it is filled completely only then electrons can be fitted in the next shell. Then how (2n)square rule is correct? according to it the maximum number of electrons should be 18???Please can you solve my query???

Asked by banerjee_milky 23rd November 2017, 9:46 PM

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## The orbital naming starts from K. Why?

Asked by aahnik.mohanty 5th November 2017, 8:21 AM

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## 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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## 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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## how can we find electrons if proton and neutron are given

Asked by Pooja 13th March 2017, 12:29 PM

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## 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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## 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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## 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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## 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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## 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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## 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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## Explain octet rule.

Asked by Topperlearning User 4th April 2016, 10:10 AM

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## 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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## (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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## 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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## (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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## (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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## 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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## 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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## 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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## 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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## 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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## 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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## 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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## 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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## (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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## 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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## 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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## How do atoms share elctrons with each other?

Asked by kumar.ashlesha 23rd March 2015, 7:50 PM

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## You are given an element . 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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## Respected Sir/Madam, We have the formula  where n is no. of shell which gives us the maximum no. of electrons the shell can accomodate . If an atom has 5 shells then the outermost shell will have 50 electrons according to the formula  but this contradicts the rule that outermost shell can only have maximum no. of  8 electrons. Please explain...

Asked by Varsneya Srinivas 28th February 2015, 11:06 AM

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## Explain distribution of electrons in different shells with examples.

Asked by singhaivk05 27th January 2015, 6:59 PM

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## 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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## 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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## 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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## 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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## 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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## What is the significance of electronic configuration of an atom?

Asked by Topperlearning User 26th August 2014, 3:50 PM

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

Asked by Topperlearning User 26th August 2014, 3:48 PM

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## Write the distribution of electrons in helium and hydrogen atoms.

Asked by Topperlearning User 26th August 2014, 3:17 PM

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## 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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## 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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## 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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## 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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## (a)The composition of nuclei of two atomic species X and Y are given below:   X Y Protons 17 17 Neutrons 18 20 Find the mass number of X and Y. State the relationship between X and Y. (b)The K shell is completely filled and L shell of an atom is half filled.Find the number of electrons present in it. State the name of this element.

Asked by Topperlearning User 14th July 2014, 4:57 PM

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## (a) How is the valency of an atom related to its electronic configuration? (b) Composition of the nuclei of two atomic species A and B is given below:                                     A                                     B                            Protons = 6                      Protons = 6                           Neutrons = 6                    Neutrons = 8     Calculate the mass number of A and B. What is the relation between the two species and which element or elements do they represent?                                                                             OR (a) Why is helium inert? (b) Why Na atom gets 1+ charge when loses one electron? (c) What are the limitations of Rutherford's model of an atom? (d) Name the particles which determine the mass of an atom.

Asked by Topperlearning User 20th May 2014, 2:46 PM

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## 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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## 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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## 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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## What are valence electrons?

Asked by Topperlearning User 13th May 2014, 1:05 PM

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## What is the significance of valence electrons?

Asked by Topperlearning User 13th May 2014, 1:03 PM

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## 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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## 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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## What are energy levels? How are they designated?

Asked by Topperlearning User 13th May 2014, 12:50 PM

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## 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