{"id":1282,"date":"2025-02-08T12:39:44","date_gmt":"2025-02-08T07:09:44","guid":{"rendered":"https:\/\/leverageedu.com\/questions-answers\/?p=1282"},"modified":"2025-02-08T12:39:47","modified_gmt":"2025-02-08T07:09:47","slug":"differentiate-between-lanthanoids-and-actinoids","status":"publish","type":"post","link":"https:\/\/leverageedu.com\/questions-answers\/differentiate-between-lanthanoids-and-actinoids\/","title":{"rendered":"Differentiate between Lanthanoids and Actinoids"},"content":{"rendered":"\n

Lanthanoids and Actinoids are two series of elements in the periodic table. Lanthanoids (elements 57-71) belong to the f-block <\/em>and are known for their shiny, soft metals, often used in magnets and lasers. Actinoids (elements 89-103) are radioactive, with some used in nuclear energy. Both series fill the 4f and 5f orbitals, respectively. Keep reading to learn how to differentiate between Lanthanoids and Actinoids.<\/p>\n\n\n\n

Complete Answer:<\/strong><\/p>\n\n\n\n

Lanthanoids and Actinoids are f-block elements, but they differ in key aspects. Lanthanoids (elements 57-71) involve the filling of 4f orbitals, are mostly non-radioactive, and show limited oxidation states (+3 being common). They are used in magnets, phosphors, and catalysts. Actinoids (elements 89-103) involve 5f orbital filling, are all radioactive, and exhibit variable oxidation states (+3, +4, +5, etc.). While lanthanoids occur naturally, most actinoids are synthetic and are used in nuclear energy and medicine.<\/p>\n\n\n\n

Here is how to differentiate between Lanthanoids and Actinoids:<\/p>\n\n\n\n

Lanthanoids<\/strong><\/td>Actinoids<\/strong><\/td><\/tr>
The atomic numbers of Lanthanoid elements range from 57 to 71.

Here is list of Lanthanoids:
Lanthanum (La)<\/strong> – 57
Cerium (Ce)<\/strong> – 58
Praseodymium (Pr)<\/strong> – 59
Neodymium (Nd)<\/strong> – 60
Promethium (Pm)<\/strong> – 61
Samarium (Sm)<\/strong> – 62
Europium (Eu)<\/strong> – 63
Gadolinium (Gd)<\/strong> – 64
Terbium (Tb)<\/strong> – 65
Dysprosium (Dy)<\/strong> – 66
Holmium (Ho)<\/strong> – 67
Erbium (Er)<\/strong> – 68
Thulium (Tm)<\/strong> – 69
Ytterbium (Yb)<\/strong> – 70
Lutetium (Lu)<\/strong> – 71<\/td>		The atomic numbers of Lanthanoid elements range from 89 to 103.

Here is a list of Actinoids:
Actinium (Ac)<\/strong> – 89
Thorium (Th)<\/strong> – 90
Protactinium (Pa)<\/strong> – 91
Uranium (U)<\/strong> – 92
Neptunium (Np)<\/strong> – 93
Plutonium (Pu)<\/strong> – 94
Americium (Am)<\/strong> – 95
Curium (Cm)<\/strong> – 96
Berkelium (Bk)<\/strong> – 97
Californium (Cf)<\/strong> – 98
Einsteinium (Es)<\/strong> – 99
Fermium (Fm)<\/strong> – 100
Mendelevium (Md)<\/strong> – 101
Nobelium (No)<\/strong> – 102
Lawrencium (Lr)<\/strong> – 103<\/td><\/tr>
These elements fill the 4f orbitals progressively.<\/td>These elements fill the 5f orbitals progressively.<\/td><\/tr>
Most lanthanoids are non-radioactive, except for a few isotopes.<\/td>All actinoids are radioactive.<\/td><\/tr>
Lanthanoids are found in the Earth\u2019s crust.<\/td>Most of the Actinoids; except elements like uranium, thorium, etc; are synthetic. <\/td><\/tr>
These elements have a common oxidation state of +3, with limited variability.<\/td>These elements show variable oxidation states (+3, +4, +5, etc.).<\/td><\/tr>
Lantanoids are less reactive than actinoids. Their reactivity increases with atomic number.<\/td>Actinoids are highly reactive, especially with oxygen and halogens.<\/td><\/tr>
Lanthanoid elements are usually harder and have higher melting points than actinoids.<\/td>Actinoids are softer and have relatively lower melting points than Lanthanoids.<\/td><\/tr>
These elements show strong paramagnetism.<\/td>These elements are paramagnetic but influenced by radioactive properties.<\/td><\/tr>
Lanthanoids are used in magnets, phosphors, and catalysts.<\/td>Actinoids are used in nuclear reactors, weapons, and medicine.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Interesting Facts about Lanthanoids and Actinoids<\/strong><\/p>\n\n\n\n

Here are some interesting facts about Lanthanoids:<\/p>\n\n\n\n