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2 Οκτ 2019 · 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.
Actinides in the periodic table. The actinide (/ ˈæktɪnaɪd /) or actinoid (/ ˈæktɪnɔɪd /) series encompasses at least the 14 metallic chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through nobelium. (Number 103, lawrencium, is sometimes also included despite being part of the 6d transition series.)
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.
The actinides are a group of 15 different elements located at the very bottom row of the periodic table. You may know this group of elements by a few different names: actinide series or actinoids. These elements range from an atomic number of 89 all the way to atomic number 103.
12 Ιαν 2022 · 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.
19 Δεκ 2022 · 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.
