8A.6 What transition in He has the same frequency (dis- regarding mass differences) as the 2p →1s transition in H?

The first excited state of Ca is reached by absorption of 422.7-nm light. (a) What is the energy difference (J) between the ground and excited states? (b) The degeneracies are g*/g0  3 for Ca. Find N*/N0 at 2 500 K. (c) By what percentage will the fraction in (b) be changed by a 15-K rise in temperature? (d) Find N*/N0 at 6 000 K.

Define the terms in the expression: ln k = ln A – Ea/RT

For the 4->3 transition, the energy released during the transition equals_ giving B= 36 cm¹ and = 1914 cm*¹ O a. 1626.0 O b. 1770.0 O c. 2202.0 O d. 1806.0 O e. 1698.0

A compem deconpoer by i fusondetion. It the concentation of the compornd 5.87 x 10'te 31s when the initial concermaton was 7.00 x In 4, wtur is the orreaten h reperrd aer U

rate of ith decay mechanism rate of removal of the singlet state rate of ith decay mechanism rate of formation of the singlet state rate of removal of the singlet state rate of ith decay mechanism Step 4 of 6 Give the quantum yield j. (Use the following as necessary: kj, k1, k2, k3, and t.) k; k1 + k, + k ki 3 ki + k2 + k3 Recalling the relationship between the overall rate constant, k, and the mean lifetime, T, give the quantum yield ¢; in terms of t and Tj. (Use the following as necessary: T and T;) O; = i Step 5 of 6 (c) If T1 = 1×10-7 s, Tɔ = 4×10-8 s, and T3 = 1×10-8 s, calculate the lifetime of the singlet state and the quantum yield for the path that has Tɔ. (Enter an unrounded value with at least 3 digits.) Calculate using the equation given in (b). 1 135e6 135000000 s-1 Solve for T, the lifetime of the singlet state. T = |7.407e-9 7.40740740740741e-09 s Step 6 of 6 Give the equation for the quantum yield for the path that has T2, P2. (Use the following as necessary: T, T1, T2,…

The metal X requires photons of light to have a frequency higher than 7.156E+14 Hz. What is the binding energy for this metal, in J?

One of the most important transitions for the helium ion involves a jump from the n = 2 to the n = 1 level. Calculate the change in energy in kJ/mole for this transition. (Hint: ΔE = ε1 - ε2).  (En = −5248.16 kJ/mol / n^2  where n = 1, 2, 3... ) Possiable eqution

iii. Consider the following transitions: I. п %3D 3 to n %3D1 (a) For which of the transitions is energy absorbed? II. n = 2 to n = 3 (b) For which of the transitions is energy emitted? III. n = 4 to n= 3 (c) Which transitions involve the ground state? IV. n = 3 to n= 5 (d) Which transition absorbs the most energy? (e) Which transition emits the most energy?

By what fraction does the mass of an H atom decreasewhen it makes an n=3 to n=1 transition?