Atomic Structure

Match it! Select the correct answer from the pull down...Good luck!

Positively charged particle

Greek philosopher who used the term atomos

What are pure substances that cannot be broken down in simpler substances by chemical means?

What are the smallest particles or building blocks of matter?

Scientist who discovered the neutron

Negatively charged particles

Which of the following will best help us determine the number of electrons?

Scientist who determined that electrons circle in specific layers or shells.