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11
One only - 1s.
No, it is not.
The quantum number set of the ground-state electron in helium, but not in hydrogen, is (1s^2) or (n=1, l=0, ml=0, ms=0). It indicates that the electron occupies the 1s orbital, which has a principal quantum number (n) of 1, an orbital angular momentum quantum number (l) of 0, a magnetic quantum number (ml) of 0, and a spin quantum number (ms) of 0.
F10
1- Number 1 feat. Tinchy Stryder
N-Dubz have had one number 1 single with 'Number 1' (featuring Tinchy Stryder). However, Tulisa has had a solo number 1 with 'Young' and Dappy did with 'No Regrets'.
5 number 1s so far
6
All My Life, Everlong
how many number 1s did roxy music have
how many number 1s has ushe had ??
200
one: bills bills bills in 1999
He had 14 solo number ones, 18 if you include the ones with the Jackson 5.
2
There are 116 1s in the first 1000 digits of pi.