Silicon
Nitrogen is a chemical element, N.
Chemical symbols represent chemical elements.
An element is a pure substance made up of the same type of atom, while a chemical symbol is an abbreviation used to represent an element. Both are used to identify and classify substances based on their unique properties.
This chemical element is mercury.
This chemical element is silicon.
As is the symbol for the element arsenic.
Gamma rays typically have enough energy to ionize atoms in the photocell material, releasing electrons. This can result in a current being generated in the photocell, which can be used to detect the presence of gamma rays.
A chemical symbol represents a single element on the periodic table, chemical symbols are used so that scientists speaking different languages can understand experiments done with specific chemicals.
This chemical element is potassium (K).
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Chlorine is the element in the halogens group that is commonly used in disinfectants and chemical weapons due to its strong oxidizing properties.
The chemical element called "Tellurium" is used in creating alloys such as steel and copper to improve machine ability. You can learn more about Tellurium at the Wikipedia.