Кириум (Cm)

Properties

Abundance
CAS Number	7440-51-9
PubChem CID	na
Atomic Radius	174
Atomic Volume	18,28
Atomic Weight	[247]
Block	f
Boiling Point	3.110
Bulk Modulus
Category	Actinides
Crystal Structure	Simple Hexagonal
Color	Silver
Covalent Radius	169
Density	13,51
Electrical Resistivity
Electron Configuration	[Rn] 5f⁷ 6d¹ 7s²
Electrons per shell	2, 8, 18, 32, 25, 9, 2
Electronegativity	1,3
Electrons	96
Group	na
Heat of Fusion	na
Heat of Vaporization	na
Ionization Potential	5,992
Magnetic Ordering
Magnetic Susceptibility
Mass	[247]
Mass Number	96
Melting Point	1.340
Name	Кириум
Neutrons	151
Atomic Number	247
Oxidation States	3, 4
Period	7
Phase	Solid
Poisson Ratio
Protons	96
Shear Modulus
Specific Heat Capacity	-
Symbol	Cm
Thermal Conductivity	0,1
Van der Waals radius
Young's Modulus
Abundance in Earth's crust	na
Abundance in Universe	na

Cm Кириум 96 (247) 7 f 96 1340.0 [Rn] 5f7 6d1 7s2 2 8 18 32 25 9 2 13.5 None Silver Hexagonal 1.3 {"1":"581"} 581 3 18.3 10.0 1 1.56×10⁷⁷y AlphaEmission Solid, Actinide, Radioactive, Synthetic KYOOR-i-em Silvery, malleable, synthetic radioactive metal. It has no significant commercial applications. Made by bombarding plutonium with helium ions. So radioactive it glows in the dark. sZobqPFNcwg Curium

Carl Wilhelm Scheele obtained oxygen by heating mercuric oxide and nitrates in 1771, but did not publish his findings until 1777.

Joseph Priestley also prepared this new air by 1774.

The name oxygen was coined in 1777 by Antoine Lavoisier, whose experiments with oxygen helped to discredit the then-popular phlogiston theory of combustion and corrosion. From the Greek word oxys, acid, and genes, forming 96 1944 Glenn T. Seaborg, Ralph A. James, Albert Ghiorso USA Named after Pierre and Marie "Curie"

Isotopes of Oxygen

Standard Atomic Weight

Stable Isotopes

Unstable Isotopes

²³³Cm ²³⁴Cm ²³⁵Cm ²³⁶Cm ²³⁷Cm ²³⁸Cm ²³⁹Cm ²⁴⁰Cm ²⁴¹Cm ²⁴²Cm ²⁴³Cm ²⁴⁴Cm ²⁴⁵Cm ²⁴⁶Cm ²⁴⁷Cm ²⁴⁸Cm ²⁴⁹Cm ²⁵⁰Cm ²⁵¹Cm ²⁵²Cm

Oxygen gas can be toxic at elevated partial pressures, leading to convulsions and other health problems

Green and red colors in the Aurora Borealis are caused by oxygen atoms

Pure oxygen is frequently used to help breathing in patients with respiratory ailments.

Oxygen is used in oxyacetylene welding, as an oxidant for rocket fuel, and in methanol and ethylene oxide production.

It is also used in the production of steel, plastics and textiles.

Plants and animals rely on oxygen for respiration.

Кириум on ChemicalAid