Mendelevium

Symbol	Md
Atomnummer	101
Gruppe	-
Periode	7
Blok	f
Klassifikation	Actinid

Udseende	-
Farve	-

Antal protoner	101 p+
Antal neutroner	157 n0
Antal elektroner	101 e-

Fra Wikipedia, den gratis encyklopædiMendelevium (opkaldt efter Dmitrij Mendelejev, som spillede en nøglerolle i udviklingen af det periodiske system) er det 101. grundstof i det periodiske system, og har det kemiske symbol Md. Det er et radioaktivt actinid, som ikke findes i naturen.

Fase ved STP	Fast
Massefylde	0 g/cm3
Atommasse	258 u

Smeltepunkt	1100 K 826.85 °C 1520.33 °F
Kogepunkt	-
Fordampningsvarme	-

Elektronegativitet (Pauling Scale)	1.3
Elektronaffinitet	93.91 kJ/mol
Oxidationstrin	+2, +3 ()
Ioniseringsenergier	635 kJ/mol 1235 kJ/mol 2470 kJ/mol 3840 kJ/mol

Elektronkonfiguration Kortfattet konfiguration	[Rn] 5f13 7s2
Elektronkonfiguration Fuld konfiguration	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f13 6s2 6p6 7s2
Elektronkonfigurationsdiagram	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f13 6s2 6p6 7s2
Elektroner pr. Skal	2, 8, 18, 32, 31, 8, 2
Outer shell electrons	2
Valency-elektroner	3
Bohrs atommodel	Figur: Skaldiagram af Mendelevium (Md) atom.
Orbital diagram 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 7s

Opdaget	Lawrence Berkeley National Laboratory (1955)
Opdagelse af mendelevium Mendelevium was the first element to be produced one atom at a time. It was synthesized in 1955 by Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley Thompson and Glenn Seaborg at Berkeley by bombarding einsteinium-253 with alpha particles. The element was named in honour of Dmitri Mendeleev, the Russian chemist who created the periodic table.

Original word	Mendeleev
Language of origin	English
Name source	Person
Meaning	“Dmitri Mendeleev”
Naming The element is named in honour of Dmitri Mendeleev, the Russian chemist who created the periodic table.

CAS Number	7440-11-1
ChemSpider ID	22385
EC number	-
PubChem CID Number	23943