Symbol: Er
Atomic number: 68
Atomic weight: 167.26
Soft silvery metallic element which belongs to the lanthanoids. Six
natural isotopes that are stable. Twelve artificial isotopes are known. Used in nuclear technology as a neutron absorber. It is being investigated
for other possible uses. Discovered by Carl G. Mosander in 1843.
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Sexual Intercour...
Era
Erg/Sec
