Tellurium was discovered in 1782 by an Austrian mineralogist Franz-Joseph Müller von Reichenstein. In In 1798,  Martin Heinrich Klaproth isolated Tellurium from  calaverite mineral.


How many valence electrons does tellurium have?


Tellurium has six valence electrons. Its electron configuration is [Kr] 4d10 5s2 5p4.



Which element has the greatest average atomic mass? iodine, bromine, tellurium, krypton?


The average atomic mass of Iodine is 126.90 g/mol, Bromine is 79.90 g/mol, tellurium is 127.60 g/mol and krypton is 83.798 g/mol. In the above Tellurium has the greatest average atomic mass.


How many neutrons does tellurium have?


Tellurium has 75 neutrons. There are six stable isotopes of tellurium with different neutrons number. T-122 has 70 neutrons. T-124 and T-125 have 72 and 73 neutrons. T-126 has 74 neutrons.


How many protons does tellurium have?


In a neutral atom of tellurium, there are 52 protons and 52 electrons.