- 99 is the atomic number
- Es is the symbol
- 252 is the atomic mass
- Einsteinium is the element name
- The electron configuration is the numbers at the bottom: 2, 8, 18, 32, 29, 8, 2.
- It is a solid at 298 K
- It is a metal
- It was discovered by workers at Argonne, Los Alamos, USA, and the University of California at Berkeley. Discovered in 1952. Used in thermonuclear bombs like the one above.
- Unusual facts:
- 1. It was identified from radioactive debris from the largest thermonuclear bomb explosion as shown above.
- 2. It has no biological role.
- 3. Synthetic element that is not present in the geosphere.
- Physical Properties:
- 1. Density of solid: 13500 Kg M^-3
- 2. Molar Volume: 28.52 cm^3
- 3. Thermal Conductivity: 10 Wm^-1 K^-1
- Chemical properties:
- 1. melting point: 1133 [860 C(1580 F)]K
Credits:
Created with images by janeb13 - "albert einstein 1921 sad look" • Science Activism - "099 Einsteinium - Periodic Table of Elements" • Jonas B - "Metal" • James St. John - "Copper (Mesoproterozoic, 1.05-1.06 Ga; Keweenaw Peninsula area, Upper Peninsula of Michigan, USA) 2" • NASA Goddard Space Flight Center - "Hubble's New Eyes: Butterfly Emerges from Stellar Demise in Planetary Nebula NGC 6302"