The basic principle of atomic absorption spectrophotometry states that atoms absorb specific wavelengths of electromagnetic radiation. Spectrophotometry is a technique used in measuring the quantity of light absorbed by a substance by determining the intensity of light transmitted by a chemical solution.
Spectrophotometry is a useful tool in quantitative analysis where the concentration of a substance is to be identified. Atomic absorption spectrophotometry assays the metal content in water. The molecules in the solution first undergo atomization to free the atoms from their bonds with other elements. The main components of an atomic absorption spectrophotomer include a light source, atomizer, monochrometer and a detector.Learn More
The atomic theory is that all matter is made up of tiny units or particles called atoms. This theory describes the characteristics, structure and behavior of atoms as well as the components that make up atoms. Furthermore, the theory states that all elements are made up of identical atoms.Full Answer >
Positively charged atomic particles are called protons. These particles, along with neutrons, exist in the nucleus of the atom. Protons and neutrons each have an atomic mass of one.Full Answer >
The atomic radius describes the size of the atom, and although there is no standard definition for the value, it is the distance between the nucleus and the outermost electrons. Atomic radii tend to increase moving down the periodic table, but they decrease moving left to right across the table because electrons are more tightly packed for elements that are closer to the right side.Full Answer >
Atomic mass is the total mass of protons, neutrons, and electrons in a given element, commonly expressed in unified atomic mass units. The International Union of Pure and Applied Chemistry (IUPAC) has defined a unified atomic mass unit as 1/12 of the mass of a single carbon-12 atom.Full Answer >