Question 7: Which one of the following represents an...

Question 7: Which one of the following represents an acceptable set of quantum numbers for the highest energy electron in the ground state magnesium atom? (arranged as n, l, ml and ms) A) 2,2,-1,-1/2 B) 1,0,0,1/2 C) 3,0,0,-1/2 D) 2,2,0,1/2 E) 3,3,2,-1/2 Question 8: Calculate the change in energy of the hydrogen atom when its electron is promoted from the ground state to the n=5 orbit. (Be sure to include the correct sign in the front of your answer).

Transcript

00:01 Now let us discuss the question.

00:02 Question says which of the following represent an acceptable set of quantum number for the highest energy electron in the ground state of magnesium atom? so let us discuss the option.

00:13 Option 1 is 2, 2 minus 1 and minus 1 divided by 2.

00:17 Option b is 1 0 and 1 divided by 2.

00:22 Option c is 3 .0 and minus 1 divided by 2.

00:30 Option d is 2 2 0 and 1 divided by 2 and option is 3 3 2 and minus 1 divided by 2 so now let us consider the magnesium atom what to magnesium atom have the quantum number so now let us discuss the question question says now let us discuss the question question says which one of the following represent an acceptable set of quantum number for the highest energy electron in the ground state of magnesium atom arranged as n l m l and ms so now these are the option given in the question so now let us discuss the magnesium atom structure first so magnesium atom has mg has 12 electrons so, electronic configuration of magnesium is 1 s2, 2 s2, 2p6, 3 s2.

01:41 So, highest energy level is third shell.

01:47 And the third shell is 3 s2.

01:50 So for 3 s2, n is equal to 3.

01:55 For s orbital, l is equal to 0.

01:59 And what is m? m is 0 for s orbital and participant of electron ms.

02:06 It can be either plus minus 1 divided by 2.

02:10 So the possible energy state for the highest electron of magnesium is 3 .00 plus 1 by 2 or 3 .00 minus 1 divided by 2.

02:25 So our option should either this or this.

02:28 So now let us match...

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