Gleason Chemistry

Aristotle did what?

• taught Atomic Theory; Hyle continuous matter

• taught all matter is made of atoms. Very tiny particles

• discovered the Electron, a negatively charged particle

• discovered the nucleus of the atom, a very dense region with a positive charge

What did Democritus do?

• created Atomic Theory

• Taught all matter is made of atoms. Very tiny particles

• Taught that chemical reactions occur when atoms are separated, rearranged, or join

• discovered the Electron, a negatively charged particle

what did Jhon Dalton NOT teach?

• all particles made of submicroscopic particles annulled atoms

• that atoms of the same element are identical

• that atoms combine in whole-number ratios

• that electrons are not found in the nucleus.

• that chemical reactions occur when atoms are separated, rearranged, or join

J.J.Tomson discovered what?

• The Electron, a negatively charged particle

• The Proton, a positively charged particle

• The Neutron, a particle with neutral charge

• The Nucleus, a area that contains particles like protons and neutrons

Lord Ernest Rutherford discovered what?

• The Neutron

• The Electron

• The Proton

• The Nucleus

Sir James Chadwick discovered what?

• The Nucleus

• The Proton

• The Neutron

• The Electron

Atomic structure:

Electrons cancel out what?

• Neutrons

• Themselves

• The entire Nucleus

• Protons

What charge do atoms have?

• None

• All of it

• some

• no

What percent chance does the electron cloud have of containing electrons?

• 100%

• 80%

• 90%

• 95%

What model did Niels Bhor use?

• revolving

• Planetary

• Circular

• Wave