crystallisa00
07.10.2019 •
Chemistry
How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -2
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Ответ:
CESIUM CONFIGURATION
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
N = 3 meaning third orbit
M = -1 means P orbit or B orbit
SO THERE ARE TWO ELECTRONS WITH M = -1 IN P ORBIT AND TWO ELECTRONS WITH M = -1 IN D ORBIT
Ответ:
"ml" represent the orbital
cesium atom configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1
since the n is 3, it presents the third energy level, we are talking about the 3s2 3p6 and 3d10 of the configuration
remember that each subshell has a specific number of orbital, and each orbital can hold 2 electrons.
s= 1
p= 3
d= 5
f= 7
a good way to remember the ml quantum number is to think of them as in a ruler with respect to the number of the orbitals. like this:
s (1)= 0
p (3) = -1, 0, +1
d (5) = -2, -1, 0, +1, +2
f (7) = -3, -2, -1, 0, +1, +2, +3
as you can see, only the "d" and "f" subshell have the ml "-2". but according to our electron configuration, we only have 6d10 not "6f". so we only have one orbital having -2, which mean 2 electrons (since there are two electrons per orbital)
Ответ:
2. Gold
3. Bismuth
4. Iodine
5. Calcium
6. Oxygen
7. Nickel
8. Chlorine
found answers on https://www.classtools.net/QR/questions_list.php?fold=29&fname=ZWDR9&diff=0