The actinide (/ ˈ æ k t ɪ n aɪ d /) or actinoid (/ ˈ æ k t ɪ n ɔɪ d /) series encompasses at least the 14 metallic chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through nobelium.

2019年10月2日 · At the bottom of the periodic table is a special group of metallic radioactive elements called actinides or actinoids. These elements, usually considered ranging from atomic number 89 to atomic number 103 on the periodic table, have interesting properties, and play a key role in nuclear chemistry.

2020年10月18日 · The actinide series on the periodic table (actinoids) includes elements with atomic number 89 through 103. All of these elements are radioactive metals. The actinides are a group of 15 elements found on the bottom row of the periodic table.

2022年1月12日 · The actinide or actinoid elements are a series of elements including atomic number 89 (actinium) through 103 (lawrencium). Here is a list of elements that are actinides, a subset of the rare earth elements group.

2023年6月30日 · Actinides have been crucial in understanding nuclear chemistry and have provided valuable usage today, such as nuclear power. These examples illustrate their importance in understanding key concepts in nuclear chemistry and related topics. Actinides are in the f-block of the periodic table.

actinoid element, any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). As a group, they are significant largely because of their radioactivity. Although several members of the group, including uranium (the most familiar), occur naturally, most are man-made.

2022年3月15日 · Actinides are elements with atomic numbers ranging from 90 to 103 that follow Actinium. They include naturally occurring thorium, protactinium, and uranium elements, as well as eleven transuranic elements created artificially through nuclear processes. Despite this, all actinides are radioactive.

2022年12月19日 · Actinide – Introduction. Actinides are elements with atomic numbers ranging from 90 to 103, which come after the element Actinium. They include eleven transuranic elements, or those created artificially through nuclear reactions, as well as naturally occurring forms of thorium, protactinium, and uranium. All actinides, however, are radioactive.

Each actinide is a radioactive metal that is very important in nuclear chemistry. Actinium, thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, and lawrencium are …

2022年6月17日 · Actinides are those elements in which the last electron enters into the anti-penultimate 5f sub-shell. These are the elements from Ac89 to Lw103 that lie in the 7th period of the periodic table and this series of elements are called actinide series.