This list includes 10 Chemical Elements that start with T, from “Tantalum” to “Titanium”. These elements range from soft, ancient metals to modern synthetic elements and radioactive actinides. They appear in electronics, alloys, medicine, and nuclear technologies. See the A–Z index.
Chemical elements that start with T are those whose English names begin with the letter T. Notable examples include Tin, used since antiquity, and Tennessine, a recently named synthetic element.
Below you’ll find the table with Element, Symbol, Atomic number, Standard atomic weight, and Discovery year.
Element: The element name helps you identify each entry and match it to common chemistry resources.
Symbol: The one- or two-letter chemical symbol shows you the standard shorthand used in formulas and tables.
Atomic number: The atomic number tells you the number of protons and orders the elements by increasing nuclear charge.
Standard atomic weight: The standard atomic weight gives you typical atomic mass rounded to three decimals for comparison.
Discovery year: The year or range shows when the element was discovered, or ‘Antiquity’ for elements known in ancient times.
Chemical Elements that start with T
| Name | Symbol | Atomic number | Standard atomic weight (u) | Description |
|---|---|---|---|---|
| Titanium | Ti | 22 | 47.87 | Discovered 1791; natural. Strong, lightweight metal used in aerospace and medical implants; named after the Titans for its strength. |
| Tin | Sn | 50 | 118.71 | Antiquity; natural. One of the earliest known metals, central to bronze making and solder; symbol Sn comes from Latin stannum. |
| Tantalum | Ta | 73 | 180.95 | Discovered 1802; natural. Dense, corrosion-resistant metal used in electronics capacitors and medical devices; named after the mythological Tantalus. |
| Technetium | Tc | 43 | N/A | Discovered 1937; synthetic. First element produced artificially; Tc-99m is widely used in medical diagnostic imaging. (synthetic) |
| Tellurium | Te | 52 | 127.60 | Discovered 1782; natural. Metalloid used in alloys and semiconductors; name derives from Latin tellus, meaning “earth.” |
| Terbium | Tb | 65 | 158.93 | Discovered 1843; natural. Rare-earth element used in green phosphors for lighting and displays; isolated from minerals with erbium. |
| Thallium | Tl | 81 | 204.38 | Discovered 1861; natural. Soft, highly toxic metal discovered via a bright green spectral line; formerly used in electronics and pesticides. |
| Thorium | Th | 90 | 232.04 | Discovered 1829; natural. Radioactive actinide explored for nuclear fuel and high-temperature materials; named after the Norse god Thor. |
| Thulium | Tm | 69 | 168.93 | Discovered 1879; natural. One of the least abundant lanthanides; used in portable X-ray devices and specialized lasers. |
| Tennessine | Ts | 117 | N/A | First synthesized 2010; synthetic. Superheavy element produced in labs and named for Tennessee’s research contributions. (synthetic) |