For the first time in 1914, Henry Moseley used X-rays for the determination of:
Correct answer: A. Atomic Number
- A. Atomic Number
- B. Atomic Mass
- C. Molecular Mass
- D. Equivalent mass
Explanation
In 1914, he observed and measured the X-ray spectra of various chemical elements using diffraction in crystals. Through this, he discovered a systematic relation between wavelength and atomic number. This discovery is now known as Moseley's Law. He found that certain lines in the X-ray spectrum of elements move by the same amount each time when we increase the atomic number by one.
Last updated
About Spectroscopy and Analysis
Spectroscopy studies how substances absorb, emit or interact with electromagnetic radiation. Coverage includes ultraviolet-visible absorption, infrared identification of functional groups, Beer-Lambert law, spectral interpretation and the use of spectroscopic data to identify or determine the concentration of chemical substances.
Practise Analytical Chemistry
105 free Analytical Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.