A Doubly-Ionized Lithium Atom $\mathrm { Li } ^ { + + }$

question 100

Multiple Choice

A doubly-ionized lithium atom $\mathrm { Li } ^ { + + }$ , which has 3 protons, undergoes a transition from the $n = 5$ state to the $n = 4$ state. What is the wavelength of the photon which is emitted during this
transition? $\left( c = 3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J} \right)$

• A) \(650 \mathrm {~nm}\)
• B) \(350 \mathrm {~nm}\)
• C) \(550 \mathrm {~nm}\)
• D) \(750 \mathrm {~nm}\)
• E) \(450 \mathrm {~nm}\)

Comprehend the reasons and conditions under which firms enter or exit an industry.

Identify how shifts in demand and supply affect market equilibrium and firms' economic profits in the short and long run.

Recognize the characteristics and implications of increasing-cost, decreasing-cost, and constant-cost industries on the industry's supply curve and market prices.

Interpret the impact of external and internal economies and diseconomies of scale on long-run average costs.

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Definitions:

Right of Return

A policy that allows customers to return purchased goods within a specific period for a refund, exchange, or credit.

Revenue Recognition

The accounting principle detailing the specific conditions under which revenue is recognized and recorded.

Reasonably Estimated

A concept that pertains to the feasibility of approximating a figure or amount in the absence of precise or complete information, often used in accrual accounting.

Bundled Sales

A marketing strategy where multiple products or services are packaged together and sold at a single price.