Mendeleev فارسی

Mendelevium (Md) – Element 101 of the periodic table

Mendelevium (symbol Md) is element number 101 of the periodic table and belongs to the “Actinide” category. Its atomic mass is about 258, and its phase under standard conditions is Solid. This element sits in period 7 and the f-block (Actinides) of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 32, 31, 8, 2. The short electron configuration of Mendelevium is [Rn] 5f¹³ 7s². Known uses of Mendelevium include Scientific research.

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Mendelevium is a radioactive, mostly synthetic element; its data may be based on limited experiments or theoretical prediction.

Properties of Mendelevium

Atomic number
101
Chemical symbol
Md
Atomic mass
258
Category
Actinide
Period
7
Block
f
Phase
Solid
Protons
101
Electrons
101
Neutrons (approx.)
157
Electron shells
2, 8, 18, 32, 31, 8, 2
Outer-shell electrons
2
Discovered
Albert Ghiorso (1955)

Electron configuration of Mendelevium

The electron configuration of Mendelevium (Md), with 101 electrons, is shown below. The last shell (shell 7) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹³ 6s² 6p⁶ 7s²
Short configuration
[Rn] 5f¹³ 7s²
Last shell
7s²

What is electron configuration and how is it written?

Electron shells of Mendelevium

Distribution of 101 electrons of Mendelevium across shells K to Q:

  1. K2
  2. L8
  3. M18
  4. N32
  5. O31
  6. P8
  7. Q2

What is a actinide?

The actinides are the 15 elements from actinium to lawrencium, part of the f-block, and all of them are radioactive.

Uses of Mendelevium

Frequently asked questions about Mendelevium

What is the atomic number of Mendelevium?

The atomic number of Mendelevium (Md) is 101; that is, every atom of it has 101 protons.

What is the electron configuration of Mendelevium?

The electron configuration of Mendelevium (Md) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹³ 6s² 6p⁶ 7s²; in short form it is [Rn] 5f¹³ 7s², and its last shell is 7s².

What is the chemical symbol of Mendelevium?

The chemical symbol of Mendelevium is Md.

Where is Mendelevium located in the periodic table?

Mendelevium is located in period 7 and the f-block (Actinides) and belongs to the “Actinide” category.

What is the atomic mass of Mendelevium?

The atomic mass of Mendelevium is about 258 (atomic mass units).

What is the phase of Mendelevium under normal conditions?

The phase of Mendelevium under standard conditions is Solid.

What are the uses of Mendelevium?

Uses of Mendelevium include Scientific research.

Who discovered Mendelevium?

Mendelevium was discovered by Albert Ghiorso in 1955.

Elements in the same category as Mendelevium (Actinide)

Actinium (Ac)Thorium (Th)Protactinium (Pa)Uranium (U)Neptunium (Np)Plutonium (Pu)Americium (Am)Curium (Cm)Berkelium (Bk)Californium (Cf)Einsteinium (Es)Fermium (Fm)Nobelium (No)Lawrencium (Lr)

See all Actinides