Understanding Atomic Models

Who first proposed the idea that atoms are the basic building blocks of matter?

• JJ Thompson

• John Dalton

• Ernest Rutherford

• Democritus

What was the main feature of John Dalton's atomic model?

• Atoms have a central nucleus

• Electrons exist in clouds around the nucleus

• Electrons are embedded in a sea of positive charge

• Atoms are solid, indivisible spheres

Which model suggested that electrons are embedded in a sea of positive charge?

• Planetary model

• Plum pudding model

• Nuclear model

• Solid sphere model

What did Ernest Rutherford's nuclear model introduce?

• Electrons in circular orbits

• A central nucleus

• Electrons in clouds

• Atoms as indivisible spheres

What is a key feature of the quantum model introduced by Erwin Schrödinger?

• Electrons embedded in positive charge

• Electrons in fixed orbits

• Electrons as indivisible particles

• Electrons in clouds with varying densities