Chapter 14: Q14.141CP (page 625)

The electronic transition in Na from 3p¹to3s¹ gives rise to a bright yellow-orange emission at 589.2 nm. What is the energy of this transition?

Short Answer

Expert verified

The energy of this transition is $3.371 \times 10^{- 19} J$ .

Step by step solution

Convert wavelengths in nanometres (nm) to metres (m).

The following equation is used to determine the energy of the transition:

$E = \frac{h c}{λ}______________(1)$

E is the energy of transition, h is the Plank's constant, c is the light velocity and $λ$ is the emission wavelength.

Plank's constant has a value of $6.26 \times 10^{- 34} J . s$ .

The value of light velocity is $2.99792 \times 10^{8} m / s$ .

The emission wavelength is 589.2 nm.

Convert wavelengths in nanometres (nm) to metres (m).

$\begin{array}{rcl} λ & = & 589.2 nm \times \frac{1 m}{10^{9} nm} \\ = & 589.2 \times 10^{- 9} m \end{array}$

Evaluation of energy of transition

Substitute all known values in equation (1).

$\begin{array}{rcl} E & = & \frac{(6.26 \times 10^{- 34} J.s) \times (2.99792 \times 10^{8} m/s)}{(589.2 \times 10^{- 9} m)} \\ = & 3.371 \times 10^{- 19} J \end{array}$

Therefore, the energy of transition is $\begin{array}{rcl} 3.371 \times 10^{- 19} J \end{array}$ .

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The electronic transition in Na from 3p¹to3s¹ gives rise to a bright yellow-orange emission at 589.2 nm. What is the energy of this transition?

Short Answer

Step by step solution

Convert wavelengths in nanometres (nm) to metres (m).

Evaluation of energy of transition

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The electronic transition in Na from 3p1to3s1 gives rise to a bright yellow-orange emission at 589.2 nm. What is the energy of this transition?

Short Answer

Step by step solution

Convert wavelengths in nanometres (nm) to metres (m).

Evaluation of energy of transition

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Inorganic Chemistry

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The electronic transition in Na from 3p¹to3s¹ gives rise to a bright yellow-orange emission at 589.2 nm. What is the energy of this transition?