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harry5112
05.06.2020 •
Mathematics
What is the value of n in the equation 1/2 (n – 4) – 3 = 3 – (2n + 3)?
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Ответ:
n=2
Step-by-step explanation:
Step 1 :
1
Simplify —
2
Equation at the end of step 1 :
1
((— • (n - 4)) - 3) - -2n = 0
2
Step 2 :
Equation at the end of step 2 :
(n - 4)
(——————— - 3) - -2n = 0
2
Step 3 :
Rewriting the whole as an Equivalent Fraction :
3.1 Subtracting a whole from a fraction
Rewrite the whole as a fraction using 2 as the denominator :
3 3 • 2
3 = — = —————
1 2
Ответ:
Explanation:
1) Principal quantum number, n = 2
n is the principal quantum number and indicates the main energy level.2) Second quantum number, ℓ
The second quantum number, ℓ, is named, Azimuthal quantum number.The possible values of ℓ are from 0 to n - 1.
Hence, since n = 2, there are two possible values for ℓ: 0, and 1.
This gives you two shapes for the orbitals: 0 corresponds to "s" orbitals, and 1 corresponds to "p" orbitals.
3) Third quantum number, mℓ
The third quantum number, mℓ, is named magnetic quantum number.The possible values for mℓ are from - ℓ to + ℓ.
Hence, the poosible values for mℓ when n = 2 are:
for ℓ = 0: mℓ = 0for ℓ = 1, mℓ = -1, 0, or +1.4) Fourth quantum number, ms.
This is the spin number and it can be either +1/2 or -1/2.Therfore the full set of possible states (different quantum number for a given atom) for n = 2 is:
(2, 0, 0 +1/2)(2, 0, 0, -1/2)(2, 1, - 1, + 1/2)(2, 1, -1, -1/2)(2, 1, 0, +1/2)(2, 1, 0, -1/2)(2, 1, 1, +1/2)(2, 1, 1, -1/2)That is a total of 8 different possible states, which is the answer for the question.