• Sign in Sign up

    Collect SG

    Collect the rewards

    Community

    How it works

    Star Stable

    (4.07/5) 1217 rates

    Play and get

    560
    Soul Gems

    For 3 quests

    I
    Register via the "PLAY FOR FREE" button, confirm your account in the email, and then Advance to level 4 of your character

    Where is the summer free chest where

    Can you answer me if this is so hard for me

    22 august 2020 15:56 1430
    1

    Caesium (IUPAC spelling[6]) (also spelled cesium in American English)[note 1] is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature.[note 2] Caesium has physical and chemical properties similar to those of rubidium and potassium. The most reactive of all metals, it is pyrophoric and reacts with water even at −116 °C (−177 °F). It is the least electronegative element, with a value of 0.79 on the Pauling scale. It has only one stable isotope, caesium-133. Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.

    The German chemist Robert Bunsen and physicist Gustav Kirchhoff discovered caesium in 1860 by the newly developed method of flame spectrosc

    26 march 2021 09:08 1430
    0

    To comment you have to be logged in!

    Log in