Roentgenium - Periodic Table (Element Information & More)

This is a SUPER easy guide on Roentgenium element.

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

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

Let’s dive right into it!

Roentgenium Element (Rg) Information

Roentgenium in periodic table (Position)

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Roentgenium in Periodic table

Roentgenium element is in group 11 and in period 7 of the Periodic table. Roentgenium is the d-block element and it is a radioactive synthetic element.

La*

Ac**

*Ce

**Th

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←Move to: Darmstadtium (Ds) element – Periodic Table
→Move to: Copernicium (Cn) element – Periodic Table

Why is Roentgenium in Period 7?

Let me ask you a question.

How many shells does a roentgenium atom have?

It’s 7. Right?

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

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

Why is Roentgenium in d-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 roentgenium is [Rn] 5f¹⁴ 6d⁹ 7s².

So the last electron of roentgenium enters the d-subshell or d-orbital.

Hence, roentgenium is the d-block element.

5 facts about Roentgenium

Interesting facts about roentgenium element are mentioned below.

The element was given the name “Roentgenium” to honor the physicist Wilhelm Rontgen.
Roentgenium was discovered by Peter Armbruster and Gottfried Münzenberg in 1994.
Roentgenium is artificially prepared in a laboratory and it is not available naturally.
There are 9 known isotopes of roentgenium and all those isotopes are radioactive in nature.
The most stable isotope of roentgenium is ²⁸²Rg, which has a half-life of only 100 seconds.

Properties of Roentgenium

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

The roentgenium element is extremely radioactive and has a very short half life.
The calculated atomic mass of the most stable isotope of roentgenium is 282 u and its predicted density is 22-24 g/cm³.
The predicted phase of roentgenium is solid at STP.
The predicted crystal structure of roentgenium is BCC (body centered cubic).
The most stable oxidation state of roentgenium is predicted to be +3. Besides this, it can also show other oxidation states like +1, +5 and +7.

Uses of Roentgenium

Roentgenium is generally used for scientific research work in chemistry. There is no commercial use of roentgenium due to its radioactive nature and scarcity.

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External resources:

Roentgenium – Wikipedia. (2013, October 4). Roentgenium – Wikipedia. https://en.wikipedia.org/wiki/Roentgenium
Roentgenium – Element information, properties and uses | Periodic Table. (n.d.). Roentgenium – Element Information, Properties and Uses | Periodic Table. https://www.rsc.org/periodic-table/element/111/roentgenium
P. (n.d.). Roentgenium | Rg (Element) – PubChem. Roentgenium | Rg (Element) – PubChem. https://pubchem.ncbi.nlm.nih.gov/element/Roentgenium
It’s Elemental – The Element Roentgenium. (n.d.). It’s Elemental – the Element Roentgenium. https://education.jlab.org/itselemental/ele111.html

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Appearance	Silvery (predicted)
State (at STP)	Solid (predicted)
Position in Periodic table	Group: 11, Period: 7, Block: d
Category	Synthetic element
Atomic number or Protons	111
Neutrons	161
Electrons	111
Symbol	Rg
Atomic mass of Roentgenium (most stable isotope)	282 u
Electrons arrangement or Bohr model	2, 8, 18, 32, 32, 17, 2
Electronic configuration	[Rn] 5f¹⁴ 6d⁹ 7s²
Crystal structure (predicted)	BCC (body centered cubic)
Density	22-24 g/cm³
CAS number	54386-24-2

Roentgenium – Periodic Table (Element Information & More)