Mendelevium – Periodic Table (Element Information & More)

Mendelevium (Md) element Periodic table

This is a SUPER easy guide on Mendelevium element.

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

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

Let’s finish this very quickly.

Mendelevium Element (Md) Information

State of Mendelevium at STPSolid (predicted)
Position of Mendelevium in Periodic tableMendelevium in periodic table (Position)
Group: actinides, Period: 7, Block: f
Category of Mendelevium elementMendelevium element category
Inner transition metals
Atomic number of Mendelevium, or 
Protons in Mendelevium
101
Neutrons in Mendelevium157
Electrons in Mendelevium101
Symbol of MendeleviumMd
Atomic mass of Mendelevium (most stable isotope) Mendelevium (Md) atomic mass
258 u
Electrons arrangement in Mendelevium

or 

Bohr model of Mendelevium
Bohr model of mendelevium (Electrons arrangement in mendelevium, Md)
2, 8, 18, 32, 31, 8, 2
Electronic configuration of Mendelevium[Rn] 5f13 7s2
1st Ionization energy of Mendelevium6.58 eV
Electronegativity of Mendelevium Electronegativity of mendelevium (Md)
1.3 (Pauling scale)
Crystal structure of Mendelevium (predicted)crystal structure of mendelevium
FCC (face centered cubic)
Melting point of Mendelevium (predicted)1100 K or 827 °C or 1521 °F
Density of Mendelevium (predicted)10.3 g/cm3
Main isotopes of Mendelevium258Md and 260Md
Who discovered Mendelevium and when?Albert Ghiorso and his team (in 1955)
CAS number7440-11-1

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Mendelevium in Periodic table

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

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Why is Mendelevium in Period 7?

Why is Mendelevium in Period 7

Let me ask you a question.

How many shells does mendelevium have?

It’s 7. Right?

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

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

Why is Mendelevium in f-block?

Why is Mendelevium 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 mendelevium is [Rn] 5f13 7s2.

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

Hence, mendelevium is the f-block element.

5 facts about Mendelevium

Interesting facts about mendelevium element are mentioned below.

  1. The element was given the name “Mendelevium” to honor the famous chemist Dmitri Mendeleev.
  2. Mendelevium was discovered by Albert Ghiorso and his team (in 1955), at Lawrence Berkeley National Laboratory, California.
  3. Mendelevium is an artificially prepared synthetic element and it is produced in very less quantity till now.
  4. There are 17 known isotopes of mendelevium and all those isotopes are radioactive in nature.
  5. Out of all the isotopes of mendelevium, the isotope 258Md is the longest lived isotope and has a half-life of around 51 days.

Properties of Mendelevium

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

  • Mendelevium is a radioactive element and it is harmful to living beings.
  • Like other actinides, the most common oxidation states of mendelevium are +3 and +2.
  • The predicted crystal structure of mendelevium is FCC (i.e face centered cubic).
  • The predicted melting point of mendelevium metal is 827 °C.
  • The atomic mass of the most stable isotope of mendelevium is 258 u and its density is predicted to be 10.3 g/cm3.

Uses of Mendelevium

Mendelevium element is generally used for research work in chemistry. It has no commercial uses due to its radioactive nature as well as scarcity.

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References:
Chemical data: Wikipedia, Chemspider

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