Ununseptium 117 Uus

Atomic No. Order:

Alphabetic Order:

Periodic Table

2,8,18,32,

32,18,7

F
9

Cl
17

Br
35

I
53

At
85

Uus
117

Uhs
167

Bus
217

Ununseptium

Symbol

Uus

Eka-At, Eka-Astatine
halogens
should be radioactive

Atomic Number

117

Relative Atomic Mass
¹²C = 12.0000

[ - ]

Significant Atomic Mass

310
Neutrons 193

Atomic Radius pm

First Ionisation Energy
kJ mol ^-1

Electronegativity

Density kg m ^-3

Molar Volume cm ³

Thermal Conductivity
W m ^-1 K ^-1

Melting Point K

Boiling Point K

Phase at Room Temperature

Expected to be a Solid

Number of Isotopes

Inner + outer Shells

= 7

Inner + /outer Orbitals

= 117

Filling Orbital

7p ⁵

Ground State Electron Configuration

[Rn]

5f 14

6d 10

7p 5

Ground State Electron Configuration with
free Orbitals (n=1)

0,0,0,0,0,0,1

Ground State Electron Configuration with
compressed Orbitals (n=162)

0,0,0,0,18,54,90

Singularity

280

162

	s	p		d	f	g	h	i	j
1	2
2	2	6
3	2	6		10
4	2	6		10	14
5	2	6		10	14	18
6	2	6		10	14	18	22
7	2	5	1	10	14	18	22	26
8

Term Symbol

³P_3/2

Discovery

Element at the time of writing has not been discovered.

CAS Reg-ID:

87658-56-8

Name Derived From

IUPAC

Ununseptium is pronounced as oon-oon-SEPT-i-em.

APSIDIUM	Created:		2002-09-01		117.pdf
	Page update:		2007-12-09		117.pdf