zh-hans:丰度zh-hans:元素周期表

[Rn] 5f 6d 7s 7p
（预测）
2, 8, 18, 32, 32, 18, 3
（预测）

Ununtrium（Uut）是原子序为113的化学元素的临时名称。

Uut是铝族最重的元素，但至今仍没有足够稳定的同位素，因此无法验证其特性是否与该族相符。科学家于2003年在Uup的衰变产物第一次发现Uut，再于2004年直接合成Uut。至今成功合成的Uut原子一共只有14个。其寿命最长的同位素为Uut，半衰期约为20秒，因此可对其进行化学实验。

Ununtrium is a chemical element with atomic number 113. It has a temporary name and temporary symbol Uut. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, ununtrium-286, has a half-life of 20 seconds. It is also known as eka-thallium or simply element 113. Ununtrium was first reported to have been created in 2003 by the Joint Institute for Nuclear Research in Dubna, Russia, and in 2004 by a team of Japanese scientists at RIKEN. In December 2015, the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP) recognized the element and assigned the priority of the discovery to RIKEN.