wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The symbol of Helium atom is He24 . How many neutrons are present in He+2 ion?


Open in App
Solution

  • The symbol of He atom is He24 . This symbol, represents the chemical name and electronic information in the atom.
  • The superscript represents the mass number which is the sum of number of neutrons and protons.
  • The subscript represents the Atomic number which is the number of electrons present in the atom.
  • For helium, its mass number is 4 and Atomic number is 2.
  • We know that, in a neutral atom, thenumberofelectrons=numberofprotons. Therefore, the number of protons in He is 2.
  • Subtracting the number of protons from Mass number we get the number of neutrons, i.e., 2
  • . Massnumber=Numberofneutrons+Numberofprotons4=n+2n=4-2n,Numberofneutrons=2
  • In the given He+2 ion, He loses 2 electrons thus, the number of electrons is 0 and the number of protons is 2. The number of neutrons present in the ion will be 4-2 =2

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electronic Configuration and Orbital Diagrams
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon