מאפיינים

CAS Number7440-72-4
PubChem CIDna
רדיוס אטומי-
Atomic Volume29.1
מסה אטומי[257]
חסוםf
נקודת רתיחה-
Bulk Modulus
קטגוריהאקטינידים
מבנה גבישי
צבע
רדיוס קוולנטי-
צפיפות החומר-
Electrical Resistivity
מבנה אלקטרוני[Rn] 5f12 7s2
Electrons per shell2, 8, 18, 32, 30, 8, 2
אלקטרושליליות1.3
Electrons100
קבוצהna
Heat of Fusionna
Heat of Vaporizationna
Ionization Potential6.5
Magnetic Ordering
Magnetic Susceptibility
מסה[257]
Mass Number100
נקודת התכה1,527
שםפרמיום
ניוטרונים157
מספר אטומי257
Oxidation States2, 3
מחזור7
פאזהמוצק
Poisson Ratio
פרוטונים100
Shear Modulus
קיבול חום סגולי-
סמל כימיFm
מוליכות חום0.1
Van der Waals radius
Young's Modulus
שכיחות
Abundance in Earth's crustna
Abundance in Universena
Fm פרמיום 100 (257) 7 f 100 [Rn] 5f12 7s2 2 8 18 32 30 8 2 None Unknown 1.3 {"1":"627"} 627 3 10.0 1 100.5 d 145.02d AlphaEmission Actinide, Radioactive, Synthetic FER-mi-em Synthetic radioactive metal. It has no significant commercial applications. Produced by bombarding lighter transuranium elements with still lighter particles or by neutron capture. SQhI52sqanA Fermium
Bismuth has been known since ancient times, so no one person is credited with its discovery.

The element was confused in early times with tin and lead because of its resemblance to those elements.

In 1753, French chemist Claude François Geoffroy demonstrated that this metal is distinct from lead and tin. From the German Weisse Masse, meaning white mass 100 1952 Workers at Argonne, Los Alamos, USA, and the University of California at Berkeley, USA. USA Named after "Enrico Fermi"

Isotopes of Bismuth

Standard Atomic Weight

איזוטופים יציבים

איזוטופים לא יציבים

242Fm 243Fm 244Fm 245Fm 246Fm 247Fm 248Fm 249Fm 250Fm 251Fm 252Fm 253Fm 254Fm 255Fm 256Fm 257Fm 258Fm 259Fm 260Fm

Bismuth is considered to be non-toxic
Bismuth has unusually high electrical resistance for a metal
Bismuth is used in producing malleable irons and is used as a catalyst for making acrylic fibers.

Bismuth oxychloride is used in cosmetics, as a pigment in paint for eye shadows, hair sprays and nail polishes.

It has also been used as a replacement for lead in shot, bullets and less-lethal riot gun ammunition.