Yes
25 of them
22/2 - 2
100 2s for the hundreds digit of 200-30010 2s for the tens digit of 220-23010 2s for the ones digit of 200-300________________________________120 '2s'
Exactly 16
4s2 - 9 can be expressed by using the identity: a2 - b2 = (a-b)(a+b) Therefore, 4s2 - 9 = (2s)2 - 32 = (2s-3)(2s+3)
Fluorine has 9 electrons, which occupy 2s and 2p orbitals. Therefore, there are a total of three orbitals in fluorine (one 2s orbital and two 2p orbitals).
9(2s-7)
2x2x2+2/2 = 9
There is only one 2s orbital in an atom.
Yes
s=4
if s is 2, 2s is 4. 3 squared is 9. 4 + 9 = 13. 13 / 5 = 2.6, which is not equal to 2.
25 of them
310.
2000
22/2 - 2