Thallium

| Main Article
| Discussion
| Related Articles  [?]
| Bibliography  [?]
| External Links  [?]
| Citable Version  [?]
| Properties [?]

|
|
|
|
|
|
|
|
|

This editable Main Article is under development and subject to a disclaimer.

[edit intro]

| Thallium | 204.3833(2) |

|

| Tl

1s22s22p63s23p63d104s24p6 4d105s25p64f145d106s26p1 |
[ ? ] | Post-Transition Metal:

|

|
|

Properties:
Soft, gray, malleable metal

Thallium is a chemical element, having the chemical symbol Tl. Its atomic number (the number of protons) is 81. It has a standard atomic weight of 204.3833 g•mol −1 and is a solid in its elemental form.

Thallium is considered a member of the "Post-transition metal" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 1,473 °C and a melting point of 304 °C.