The Energy Change for an Electronic Transition in a One-Electron $\left(-2.178 \times 10^{-18} \mathrm{~J}\right) Z^{2}\left(\frac{1}{n_{\text {final }} 2}-\frac{1}{n_{\text {initial }} 2}\right)$

question 99

Multiple Choice

The energy change for an electronic transition in a one-electron atom or ion H, He⁺, Li²⁺, etc.) from n _initial to n _final Is given by , $\left(-2.178 \times 10^{-18} \mathrm{~J}\right) Z^{2}\left(\frac{1}{n_{\text {final }} 2}-\frac{1}{n_{\text {initial }} 2}\right)$
where Z is the atomic number.
Which one of the following species will have the longest wavelength emission line for the transition between the n_initial = 2 and n_final = 1 levels?

• A)H
• B)He⁺
• C)Li²⁺
• D)Be³⁺
• E)B⁴⁺

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Definitions:

Eggs

Reproductive cells produced by female organisms in many species, including birds, reptiles, amphibians, most fish, and certain mammals; also, a common food source.

Prereproductive Individuals

Members of a population who are at a life stage before they have reached sexual maturity and are capable of reproduction.

Fertility Rate

The average number of children born to a woman over her lifetime within a population.

Population

A group of individuals of the same species living in the same area and capable of interbreeding.