The absorption spectrum of individual elements refers to the specific wavelengths of light that are absorbed by those elements. Each element has a unique set of absorption lines or bands associated with it. These absorption lines are typically observed as dark lines or gaps in a continuous spectrum when light passes through a sample of the element and certain wavelengths are absorbed.
The exact wavelengths of absorption lines depend on the electronic structure and energy levels of the atoms or ions of each element. The wavelengths of absorption lines for elements are typically measured using spectroscopic techniques.
There are several resources available that provide lists of absorption wavelengths for individual elements. Some of these resources include scientific databases, research papers, and spectroscopy references. It's important to note that the values provided might vary depending on the specific conditions and sources of the data.
One widely used resource for absorption spectra is the National Institute of Standards and Technology (NIST) Atomic Spectra Database (https://www.nist.gov/pml/atomic-spectra-database). It provides extensive data on atomic spectra, including wavelengths and transition energies, for a wide range of elements.
When searching for specific absorption wavelengths, it's recommended to refer to reliable scientific sources and databases to obtain the most accurate and up-to-date information.