Question

The helium balloon you got on your birthday has almost entirely deflated, but there is still a very small amount of 4He inside with a total mass of 160 amu. How many protons and how many electrons are present in the balloon (assuming only 4He is there)?

Answer 1

It has 8 electrons and 8 protons.

Step-by-step explanation:

Given that we have a deflated balloon with 4 atom (more precisely, 4 mono-atomic molecules) of helium element. A Helium atom has 2 electrons and 2 protons along with 2 neutrons.

So the no. of electrons of He in the balloon:

`n_e=4* 2=8`

So the no. of protons of He in the balloon:

`n_p=4* 2=8`