Chemistry, asked by mia1455, 1 year ago

nucleus of a gaseous element is represented by atomic number Y and mass number 2Y. this atom is used in weather observation balloons identify the element

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Answered by Anonymous

3

Helium is used in balloons.....

atomic number of He = 2

mass number of He = 4 (2 proton + 2 neutron)

#Answered@C29

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