Question

Which of the following is a possible set of quantum numbers for an electron?

(1, 1, 0, +½)
(1, 0, 0, +½)
(3, 2, 3, -½)
(3, -1, 0, -½)

Answer 1

@UnkleRhaukus

Answer 2

@ganeshie8

Answer 3

@Australopithecus

Answer 4

@perl

Answer 5

HIII UNCLE RHAUKUS

Answer 6

HI !

Answer 7

*UNKLE

Answer 8

i'm kinda lost on this question :(

Answer 9

lets look at the QM numbers one at a time

Answer 10

the first one is n ; the principal QM, it represent the electron shell

n has to be some positive natural number

Answer 11

all the n's in the options are valid

Answer 12

the second QN , \(\ell\); is the subshell

this can be values from 0 up n-1

Answer 13

this makes of two of the options invalid,

can you tell me which two?

Answer 14

Yes the options have the second term: either not greater than 0, or not less than n

so they can't be right

Answer 15

we have these options left:

(1, 0, 0, +½)
(3, 2, 3, -½)

Answer 16

the third quantum number is the magnetic quantum number, \(m_\ell\)
this can be any integer less than or equal in magnitude to \(\ell\)


_____
for example if \(n\) was 5 and \(ell\) was 4,
\(m_{\ell}\) could be -4, -3, -2, -1, 0 , 1, 2, 3, or 4

Answer 17

\(ell\)*\(\ell\)

Answer 18

The final quantum number is related to the spin of the electron, \(m_s\)

this can only take values of: \(+\tfrac12\) or \(-\tfrac12\)

Answer 19

Only one of the options has both:

the second QN less than the first (but non-negative),

and

the third QN less than or equal to (in magnitude) the second

Answer 20

Which option is this @tywower?

Answer 21

the third one

Answer 22

nope,

the third option has

the third QN greater than (in magnitude) the second QN

Answer 23

can u explain why it's the second one :)

Answer 24

A. (1, 1, 0, +½)

not this one, \(\ell\not<n\)

(1, 0, 0, +½)

maybe

(3, 2, 3, -½)

not this one, \(|m_\ell|\not\leq \ell\)

(3, -1, 0, -½)

not this one either, \(\ell\not>0\)

Answer 25

thank you so much @UnkleRhaukus u are absolutley amazing! can u help me with some more?

Answer 26

more Q numbers?

Answer 27

No, they're just questions I'm having a hard time understanding :)

Answer 28

ok,

Answer 29

Such as:
Which of the following pairs of elements could possibly be found in the same group on the periodic table?

A is an alkali metal, B forms a 1- ion.
A has the atomic number 20, B forms a 2- ion.
A is a noble gas, B has seven valence electrons.
A forms a -3 ion, B has five valence electrons.

Answer 30

What kind of ions do metals form? + or - ?

Answer 31

+

Answer 32

so could the first option possibly be true?

Answer 33

maybe

Answer 34

elements in a group (column) always form the same kind of ions

e.g.
Mg^+, Ca^+, are ions of group II,

F^-, Cl^-, Br^-, are ions of group VII

Answer 35

If A and B are of the same group,
and A (a metal) forms ^+ ions, could B form ^- ions?

Answer 36

@tywower

Answer 37

@UnkleRhaukus

Answer 38

@UnkleRhaukus

Answer 39

@tywower

Answer 40

sorry i got distracted

Answer 41

lol

Answer 42

@tywower

Answer 43

@UnkleRhaukus it's the last one right

Answer 44

perhaps