O 3/30/2015 09:00 AM A 91.7/100 Gradebook Print Calculator Periodic Table Questi

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O 3/30/2015 09:00 AM A 91.7/100 Gradebook Print Calculator Periodic Table Question 4 of 32 Map Organic Chemistry Roberts & Company P presented by Sapling Le Marc Loudon Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth. The rules in that universe are 1. principal quantum number n 1, 2 (as on Earth); 2. angular momentum quantum number 0, 1, 2,... n 1 (as on Earth) 3. magnetic quantum number m 0, 1, 2, ,t (only positive integers up to and including t are allowed 4. spin quantum number m 1, 0, +1 (that is, three allowed values of spin) (a) Assuming that the Pauli exclusion principle remains valid in the distant universe, what is the maximum number of electrons that can populate a given orbital there? Number (b) Write the electronic configuration of the element with atomic number 8 in the periodic table Formatting: superscript numbers where appropriate but omit parentheses. (c) What is the atomic number of the second noble gas? Number Previous 8 Give Up & View Solution Check Answer Next IExit 8 Hint Resources Assignment Ir Available From: Due Date: Points Possible: Grade Category Description: Policies: You can check y You can view So up on any quest You can keep try you get it right C There is no pen O Help With This O Web Help & V O Technical Sup

Explanation / Answer

(a) since there are 3 possible spins, there are 3 electrons possible in maximum in an orbital

(b) 8 electrons since atomic number = 8

so n =1 [1st orbit] , L = 0 ==> indicating s orbital and m = 0 and ms = 3 spins -1 , 0 , +1

n = 2 [2nd orbit] , L = 1 ==> indicating p orbital and m = 0, +1 since only positive integers are allowed

m = 0 means "s" orbital and in p orbital, there is just 0, +1 (two p orbitals). so we can just say Px and Py but NOT Pz

n = 3 [3rd orbit] , L = 2 ==> indicating p orbital and m = 0, +1, +2 since only positive integers are allowed

m = 0 means "s" orbital and in p orbital, there is just 0, +1 +2 (three d orbitals)

so we can just say dxy , dyz and dxz but not other two

  

so filling 8 electrons now

1s3  2s3 2px1 2py1

(c) 2nd noble gas means 2nd shell completely filled

1s3  2s3 2px3  2py3

so 12 electrons, so atomic number 12 eleemnt is the 2nd noble gas

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