What Is Fermium Element Definition Properties Isotopes and Uses
Fermium is a metal with an atomic number of 100. It is synthetic. The symbol representing fermium is Fm. Fermium is a radioactive element found in the actinide series of the periodic table. Many elements are created when neutrons of lighter elements bombard. Fermium is the heaviest of all those elements.
In the first-ever successful hydrogen bomb test, fermium was discovered. It was named after one of the greatest nuclear physicists, Enrico Fermi. However, it was Albert Ghiorso who discovered the element.
Till now, nothing huge has been discovered about fermium. However, scientists predict that fermium is an element that might be sensitive to air, steam and acid. Another fact about this metal is that it does not retain a vast half-life.
What Are Actinides?
The first element of the actinide series, Actinium, gives the name 'Actinide'. Actinide series is represented by 'an'. Actinide series comprises 15 elements ranging from 89 to 103. The elements of this series are Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, and Lawrencium.
Properties of Fermium
Fermium symbol- Fm
Group- actinides
Period- 7
Blocking
Fermium atomic number- 100
Atomic mass of fermium- (257) gmol-1
State at 20°C- Solid
Electronic configuration of fermium- [Rn] 5f127s2
Isotopes- 257Fm
Fermium boiling point- Unknown
Melting point- 1527°C, 2781°F, 1800 K
Fermium Density (g cm-3)- Unknown
Fermium mass number- 257 u
Fermium colour- Silvery-white
Chemical Properties of Fermium
Reaction with Water - Very little amount of Fermium is generated, so fermium's behaviour with water is still unknown. However, it is predicted that it might resemble that of the element erbium (present just above fermium in the periodic table).
Reaction with Acids - Since only a small amount of fermium is generated, its reactivity with acids is unknown. However, scientists predict that fermium might be susceptible to acids.
Reaction with Air - A very minor amount of fermium is generated, so it's still to be discovered how it reacts with air. However, scientists predict that fermium might be sensitive to air.
Reaction with Bases - Fermium's reactivity with bases is not known due to the generation of a minor amount of fermium. It is predicted that it might be the same as that of erbium which is present immediately above fermium in the periodic table.
Reaction with Halogens - Reactivity of fermium is yet to be discovered. However, it is predicted that it might resemble that of erbium, the element just above fermium in the periodic table.
Uses of Fermium
It is known that fermium is generated in a minor amount, and all the isotopes have extremely short lives. So, there are no such commercial uses of fermium.
Scientists are using fermium for experiments. As there are many facts yet to be discovered about this element, therefore, scientists are still experimenting on fermium to get a broader horizon of knowledge about fermium.
Fun Facts on Fermium
There are still many things left to be discovered about Fermium. However, there are certain facts about fermium that are known currently.
Fermium does not occur naturally. So, it does not have any hazardous fact or effect on health.
Presently, fermium can be found in very small quantities. If neutrons of plutonium are bombarded inside a nuclear reactor, fermium can be attained in small quantities. 257Fm and other isotopes can be generated by this process.
It is known that fermium does not occur naturally any longer. However, earlier fermium was known to have been generated in natural nuclear reactor deposits.
Fermium has no role in the biological world. It is radioactive and hence toxic.
FAQs on Fermium Element and Its Atomic Structure and Properties
1. What is fermium in chemistry?
Fermium is a synthetic radioactive actinide element with atomic number 100 and symbol Fm. It belongs to the actinide series of the periodic table and is part of the f-block elements.
- Atomic number: 100
- Element symbol: Fm
- Group: Actinide (inner transition metal)
- Nature: Highly radioactive, man-made element
2. What is the atomic number and electron configuration of fermium?
The atomic number of fermium is 100 and its ground-state electron configuration is [Rn] 5f12 7s2.
- Core configuration: [Rn] (radon core)
- Valence electrons: 5f12 7s2
- Block: f-block
3. How was fermium discovered?
Fermium was discovered in 1952 in the debris of the first hydrogen bomb explosion through neutron capture reactions. It was identified by scientists analyzing nuclear fallout from the thermonuclear test "Ivy Mike."
- Formation involved multiple neutron capture processes
- Produced from heavy uranium isotopes under intense neutron flux
- Named after physicist Enrico Fermi
4. Where is fermium located on the periodic table?
Fermium is located in the actinide series of the periodic table in period 7 and the f-block.
- Period: 7
- Block: f-block
- Series: Actinides
- Position: Between einsteinium (Es, 99) and mendelevium (Md, 101)
5. What are the common oxidation states of fermium?
The most common oxidation state of fermium is +3 in aqueous solution.
- Most stable state: +3 (Fm3+)
- Possible state: +2 under certain reducing conditions
6. Is fermium radioactive?
Yes, fermium is a highly radioactive element with no stable isotopes.
- All known isotopes undergo radioactive decay
- Common isotope: Fm-257
- Decay modes: Primarily alpha decay and spontaneous fission
7. What is the most stable isotope of fermium?
The most stable isotope of fermium is Fm-257, which has a half-life of about 100.5 days.
- Mass number: 257
- Decay type: Mainly alpha decay
- Relatively longest half-life among fermium isotopes
8. How is fermium produced?
Fermium is produced by neutron bombardment of lighter actinide elements in nuclear reactors or during nuclear explosions.
- Heavy nuclei such as uranium or plutonium capture multiple neutrons
- Successive beta decays increase the atomic number
- Occurs under extremely high neutron flux conditions
9. What are the chemical properties of fermium?
Fermium shows chemical properties typical of actinide metals, especially resembling erbium and other +3 ions in solution.
- Common ion in water: Fm3+
- Forms ionic compounds such as halides (e.g., FmCl3)
- Metallic character expected in solid state
10. What are the uses of fermium?
Fermium has no commercial uses and is used only for scientific research.
- Studying nuclear reactions and heavy element synthesis
- Investigating actinide chemistry
- Understanding properties of superheavy elements
