Home / Newton Desk / Curium Cm (Element 96) of Periodic Table
Curium Cm (Element 96) of Periodic Table

Curium Cm (Element 96) of Periodic Table

96 Cm (Curium)

Appearance – Silvery metallic, glows purple in the dark (It tarnishes rapidly in air)

Mass number – 247

Atomic weight – 247.0703 g/mol

Atomic number (Z) – 96

Electrons: 96

Protons: 96

Neutrons: 151

Period – 7

Block – f

Element category – Actinide

Electrons per shell – K2, L8, M18, N32, O25, P8, Q2

Electron configuration – 1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p65f76d17s2

Phase – Solid

Melting point – 1613 k (1340 oC)

Boiling point – 3383 k (3110 oC)

Density – 13.51 g/cm3

Half life(s) – 492×1012

Lifetime(s) – 710×1012

Decay mode – α decay

Neutron cross section (Barns) – 60

Heat of fusion – 13.85 kJ/mol

Oxidation states – 6, 4, 3, 2

Electronegativity – 1.3

Valence – 4

Ionization energies – 1st: 581 kJ/mol

Atomic radius – 174 pm

Covalent radius – 169± 3 pm

Crystal structure – Double hexagonal close-packed

Grid parameters – a=3.496, c=11.33

Attitude c/a – 3.24

Electrical resistivity – 1.25 μΩ•m

Magnetic ordering – Antiferromagnetic paramagnetic transition at 52 k

CAS Number – 7440-51-9

Naming – Named after Marie Sklodowska-Curie and Pierre Curie

Discovery – Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (1944)

Isotopes – 242Cm 243Cm 244Cm 245Cm 246Cm 247Cm 248Cm­ 250Cm

Uses – It has been used to provide power to electrical equipment used on space missions.

Biological role – It is toxic due to its radioactivity.

Natural abundance – Curium can be made in very small amounts by the neutron bombardment of plutonium in a nuclear reactor and  Minute amounts may exist in natural deposits of uranium

#Curium

More Elements FlashCards

About Newton

One comment

  1. I genuinely enjoy studying on this site, it has got great blog posts.

Leave a Reply

Your email address will not be published. Required fields are marked *

*

Scroll To Top
Translate »
error: