Q1. Ramalkan panjang gelombang (nm) garis emisi pada deret Balmer dengan tingkat energi asal, n2 = 6

Background

Topic: Atomic Spectra and Quantum Transitions

This question tests your understanding of the Balmer series in the hydrogen atom, which involves electron transitions from higher energy levels (n2) to n1 = 2, resulting in visible light emission.

Key Terms and Formulas

• Balmer series: Transitions where electrons fall to n1 = 2.

• Rydberg formula for wavelength:

• Rydberg constant ():

• n1 = 2 (Balmer series), n2 = 6 (given)

Step-by-Step Guidance

1. Identify the quantum numbers: , .

2. Write the Rydberg formula for the wavelength of the emitted photon: .

3. Substitute the values for and into the formula: .

4. Calculate the numerical values inside the parentheses: .

5. Multiply the result by the Rydberg constant to find .

Try solving on your own before revealing the answer!

Q2. Spektrum garis atom: Tentukan bilangan kuantum tertinggi (n2) dan terendah (n1) yang memberikan garis emisi A dan B. Tentukan identitas spesies yang menghasilkan spektrum tersebut.

Background

Topic: Atomic Line Spectra and Quantum Numbers

This question tests your ability to interpret atomic emission spectra and relate them to quantum transitions, as well as to identify the atomic species based on the observed spectral lines.

Key Terms and Formulas

• Quantum numbers: (lower energy level), (higher energy level)

• Rydberg formula:

• Atomic emission spectrum: Lines correspond to electron transitions between energy levels.

Step-by-Step Guidance

1. Observe the given wavelength for line A: .

2. Use the Rydberg formula to relate the wavelength to quantum numbers and .

3. Set up the equation: .

4. Consider that the transition is from the first excited state (highest ) to a lower .

5. Use the periodic table and the context (single electron species) to hypothesize the atomic species (likely hydrogen-like ions).

Try solving on your own before revealing the answer!