PPT Slide

• Matter is electrically neutral, so atoms must be neutral as  well. If atoms contain negatively charged electrons, what  positive charges balance them?

24

• If an electron has such an incredibly tiny mass, what  accounts for the remainder of an atomís mass?

• Thomson proposed a spherical  atom model composed of diffuse,  positively charged matter, in  which electrons were embedded  like ìraisins in a pudding.î

positive charge

Previous slide

Next slide

Back to first slide

View graphic version

24