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C) Electrons would be ejected, and they would have greater kinetic energy than ... How many photons are contained in a flash of green light (525 nm) that ...
Typology: Study notes
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A) Mg B) Si C) P D) S E) Cl
Calculations – Write your initials in the upper-right corner of every page that contains work. For full credit show all work and write neatly; give answers with correct significant figures and units. For calculations, place a box around your final answer.
a. Which transition has a longer wavelength? n = 7 → n = 5 n = 3 → n = 1
b. Which has the lowest energy? 6 s 5 d 4 f
c. A gas phase element gaining an electron is a typically endothermic process. True False
d. How many electrons in an atom could have n = 4, l = 2 , ml = +1? __________
e. The two most probable ions of titanium are __________ and __________.
dia- or para-
a. Calculate the energy of the photon that is emitted in joules. [2 points]
b. Calculate the frequency in Hertz. [2 points]
c. Calculate the wavelength in meters. [2 points]
d. Does this emission occur within the visible region of the electromagnetic spectrum? [ points]
Formulas & Constants (you may or may not need)
1 inch = 2.54 cm (exact) 1 mile = 5280 ft ≈ 1.609 km 1 kg ≈ 2.205 lb
1 lb = 16 oz ≈ 453.6 g 1 gal = 4 qt = 8 pt ≈ 3.785 L 1 L = 1000 cm^3
K = C + 273.15 F = 1.8 x C + 32 C = (F – 32)/1.
1 cal = 4.184 J 1 Cal = 1000 cal q = m x C x ΔT
Avogadro’s # = 6.022x10^23 Molar volume = 22.4 L R = 0.08206 L∙atmmol∙K
P 1 V 1 T 1 =^
P 2 V 2 T 2 𝑢rms^ = √
3RT 𝑀 𝐾𝐸 =^
1 2 𝑚𝑣
(^2) = 3 2 𝑅𝑇
1 atm = 760 mmHg 1 mmHg = 1 torr PTotal = P 1 + P 2 + ...
PA = ΧA · PTotal PV = nRT ∆E = q + w
w = −P∆V q = C × ∆T q = m × s × ∆T
∆ H °rxn = Σ[n ∆ H f°(products)] – Σ[n ∆ H f°(reactants)] R = 8.314 J/mol · K
h = 6.626×10−^34 J · s c = 2.9979×10^8 m/s RH = 2.18×10−^18 J
1 Hz = s−^1 𝜆 = (^) 𝑚𝑣ℎ ∆𝑥 × 𝑚∆𝑣 ≥ (^) 4𝜋ℎ
Ephoton = hν = ℎ𝑐𝜆 Ephoton = R𝐻 [( (^) n^1 final^2 ) − ( (^) n^1 initial^2 )]
(to be handed in)