PS Topic 8/Lesson 1 Quiz Review

Part of Bohr's theory that was incorrect

Electrons orbit the nucleus like planets orbit the sun

Electron

Particles that move around the center of the atom.

Nucleus

Two types of particles (protons and neutrons) form this dense center.

Neutron

This particle has no charge and is located in the nucleus.

Proton

This particle is positively charged and is located in the nucleus.

Atomic Mass

Mass number

# of neutrons

Mass number (Atomic mass) - Protons

Main difference between the cloud model and the modern model

Cloud model does not include neutrons

Supports claim that the atom has a dense, positively charged core (Rutherford's gold foil experiment)

Some positive particles deflected at sharp angles and some positive particles bounced back in the direction they came from