Element
| Formula / Notation | Symbol e.g. ¹²₆C; defined by atomic number Z (proton count) |
|---|---|
| Also Known As | Chemical element, pure element, atomic species |
What is Element?
A pure substance consisting of only one type of atom, characterized by its atomic number (number of protons). Elements cannot be broken down by ordinary chemical means. There are 118 known elements, arranged in the periodic table. Examples: hydrogen, carbon, gold.
Formula & Notation
Other Names / Synonyms: Chemical element, pure element, atomic species
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A pure substance consisting of only one type of atom, characterized by its atomic number (number of protons). Elements cannot be broken down by ordinary chemical means. There are 118 known elements, arranged in the periodic table. Examples: hydrogen, carbon, gold.
Elements are used in their pure forms (copper wire, iron steel, aluminium foil, silicon chips, gold jewellery) and as starting materials for all chemical synthesis. Isotopically pure elements are used in NMR spectroscopy, radiopharmaceuticals, and nuclear engineering.
Hazard varies enormously: inert noble gases (He, Ne) are non-toxic; F₂ and Cl₂ are toxic gases; alkali metals react violently with water; radioactive heavy elements (Ra, U, Pu) require radiation protection. Always check the specific element's SDS.
The formula or notation for Element is: Symbol e.g. ¹²₆C; defined by atomic number Z (proton count)