IDNLearn.com makes it easy to get reliable answers from knowledgeable individuals. Discover prompt and accurate answers from our experts, ensuring you get the information you need quickly.
Sagot :
Answer:
The ans is : A. Electron, proton, hydrogen atom, helium atom.
Thank you for contributing to our discussion. Don't forget to check back for new answers. Keep asking, answering, and sharing useful information. Thanks for visiting IDNLearn.com. We’re dedicated to providing clear answers, so visit us again for more helpful information.