Nobelium (No) – Periodic Table (Element Information & More)

Nobelium (No) element Periodic table

This is a SUPER easy guide on Nobelium element.

In fact, the table mentioned below is the perfect information box (Which gives you every single detail about the Nobelium element in Periodic table.)

So if you want to know anything about Nobelium element, then this guide is for you.

Let’s dive right into it!

Nobelium Element (No) Information

State of Nobelium at STPSolid (predicted)
Position of Nobelium in Periodic tableNobelium in periodic table (Position)
Group: actinides, Period: 7, Block: f
Category of Nobelium elementNobelium element category
Inner transition metals
Atomic number of Nobelium, or 
Protons in Nobelium
102
Neutrons in Nobelium157
Electrons in Nobelium102
Symbol of NobeliumNo
Atomic mass of Nobelium (most stable isotope) Nobelium (No) atomic mass
259 u
Electrons arrangement in Nobelium

or 

Bohr model of Nobelium
Bohr model of nobelium (Electrons arrangement in nobelium, No)
2, 8, 18, 32, 32, 8, 2
Electronic configuration of Nobelium[Rn] 5f14 7s2
1st Ionization energy of Nobelium6.65 eV
Electronegativity of Nobelium Electronegativity of nobelium (No)
1.3 (Pauling scale)
Crystal structure of Nobelium (predicted)crystal structure of nobelium
FCC (face centered cubic)
Melting point of Nobelium (predicted)1100 K or 827 °C or 1521 °F
Density of Nobelium9.9 g/cm3
Main isotope of Nobelium259No
Who discovered Nobelium and when?Georgy Flerov and his team (in 1966)
CAS number10028-14-5

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Nobelium in Periodic table

Nobelium element is in period 7 and in actinides group of the Periodic table. Nobelium is the f-block element and it belongs to inner transition metals group.

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Why is Nobelium in Period 7?

Why is Nobelium in Period 7

Let me ask you a question.

How many shells does nobelium have?

It’s 7. Right?

You have already seen the bohr model of nobelium atom in the above table.

From the Bohr model, it can be found that the number of orbits or shells in nobelium is 7. Hence, as nobelium has 7 orbits, it lies in period 7 of the Periodic table. 

Why is Nobelium in f-block?

Why is Nobelium in f-block

Before knowing this reason, first of all I want to ask you a simple question.

How can you determine the blocks-wise position of elements?

The simple answer: The elements will lie in the s, p, d or f block will completely depend upon the subshell in which the last electron will enter.

For example; the electron configuration of nobelium is [Rn] 5f14 7s2.

So the last electron of nobelium enters the f-subshell or f-orbital. 

Hence, nobelium is the f-block element.

5 facts about Nobelium

Interesting facts about nobelium element are mentioned below.

  1. The element was given the name “Nobelium” to honor the chemist Alfred Nobel.
  2. The Nobelium element was discovered by Georgy Flerov and his team (in 1966) at Joint Institute for Nuclear Research, Russia.
  3. Nobelium is a radioactive element that is artificially prepared by humans and it is produced in very less quantities.
  4. There are 13 known isotopes of nobelium, and all isotopes are radioactive.
  5. Out of 13 known isotopes of nobelium, the isotope 259No is the longest lived isotope and has a half life of 58 minutes only.

Properties of Nobelium

The physical and chemical properties of nobelium element are mentioned below.

  • The Nobelium element is a radioactive element and it is harmful for living organisms.
  • The common oxidation states of nobelium are +3 and +2, which is the same as that of other actinides.
  • The predicted melting point of nobelium is 827 °C, which is same as that of mendelevium element.
  • The crystal structure of nobelium is predicted to be FCC (face centered cubic).
  • The most stable isotope of nobelium (259No) has the atomic mass 259 u and its predicted density is 9.9 g/cm3.

Uses of Nobelium

The Nobelium element is generally used for scientific research work. It has no commercial uses due to its scarcity as well as radioactive nature.

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References:
Chemical data: Wikipedia, Chemspider

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