1. Plutonium is after neptunium in the Periodic Table of Mendeleev.
2. The dwarf planet Pluto is after Neptune in the Solar system.
Both Neptune and Pluto were discovered in the early 20th century. Neptunium and Plutonium were later named after these planets by scientists involved in the discovery of these elements, reflecting the trend of naming newly discovered elements after celestial bodies around that time. The names also carry on the tradition of using Roman mythology in naming elements.
Mercury, Uranium, Neptunium, Plutonium.
Neptunium and plutonium were discovered in United States in 1940.
When neptunium disintegrates, it typically forms elements such as plutonium, americium, and curium through a process called radioactive decay. These elements are sequentially produced as neptunium undergoes nuclear reactions, leading to the creation of heavier elements.
Multiple elements as listed by the Periodic Table of the Elements are named after bodies in the Cosmos. Helium (He) regards Greek Helios; the Sun. Mercury (Hg), Uranium (Ur), Neptunium (Np), and Plutonium (Pu) as in the planets, are others.
Other transuranic elements as neptunium, americium, curium, berkelium, californium, etc.
The actinides (or actinoids) family contain the following elements: actinium, thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrentium; beginning with neptunium the elements are only artificially obtained.
Mercury, Uranium, and Neptunium were named after Mercury, Uranus, and Neptune (respectively). Although technically not a planet, Plutonium was named after Pluto.
There are eight elements named after the universal planets, which includes Pluto. These are Uranium, Neptunium, Plutonium, Cerium, Palladium, Tellurium, Selenium, and Mercury.
Plutonium Pu, Uranium U, Neptunium Np and Mercury Hg
Neptunium is a radioactive actinide element with the atomic number 93. It is situated in the actinide series of the periodic table, which is the row below the lanthanide series, between uranium and plutonium.
All the elements after uranium exist but excepting neptunium and plutonium (present in the earth crust only in ultratrace concentrations) they are man made.