Chapter 1 element Francium is
.Francium element is the element with the highest reaction among elements. A radioactive element with very high radioactivity by decay is the element astatine, radium and radon as alkali metal element in the group (alkali metal).1 particle, and francium is abundance (Abundance) very little in nature (at least in the level of secondary elements, we 2 Teen) by mixed with uranium and thorium in ores. Which will be found repeatedly - 223 happens and broken continuously.340-550 G
.Data element name francium
(Name): francium (Francium) symbol (Symbol): Fr
atomic number (Atomic Number): 87 atomic mass (Atomic. Mass): 223.0 amu
melting point (Melting Point): 27.0 C (300.15, K 80.6 F)
boiling point (Boiling Point): 677.0 C (950.15 K 1250.6,, F)
of protons (Number of Protons): 87
.The electron (Number of Electrons): 87
of neutrons (Number of Neutrons): 136
classification: alkali metals (Alkali. Metal)
crystal structure (Crystal Structure): cubic (Cubic)
density (Density) 293 K: does not appear (Unknown)
color (Color). : do not appear (Unknown)
.
การแปล กรุณารอสักครู่..
