Chemistry The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? 1/4 1/3 1/8 1/6 1/4 1/3 1/8 1/6 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The heaviest naturally occurring element is: Thorium Mercury Uranium Polonium Thorium Mercury Uranium Polonium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas used for artificial ripening of green fruit is carbon dioxide ethane ethylene acetylene carbon dioxide ethane ethylene acetylene ANSWER DOWNLOAD EXAMIANS APP
Chemistry Atoms of different elements have Same number of electrons and neutrons Same atomic number and same electronic configuration Different atomic number and same eletronic configu-ration Different atomic number and different number of valence electrons Same number of electrons and neutrons Same atomic number and same electronic configuration Different atomic number and same eletronic configu-ration Different atomic number and different number of valence electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas that usually causes explosions in coal mines is Hydrogen Air Carbon monoxide Methane Hydrogen Air Carbon monoxide Methane ANSWER DOWNLOAD EXAMIANS APP
Chemistry The third shell of an atom can have a maximum of ______ electrons 13 15 21 18 13 15 21 18 ANSWER DOWNLOAD EXAMIANS APP
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