History of Atom

According to the wave-mechanical model of the atom, electrons in an atom

• travel in defined circles

• are most likely found in an excited state

• have a positive charge

• are located in orbitals outside the nucleus

In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.

• Atoms
• Parts
• Molecules
• Hydrogen

Tags

NGSS.MS-PS1-1

In the Thomson Model, he discovered the existence of what particle?

• Electrons
• Protons
• Neutrons
• Quarks

Which model is this?

• Thomson Model
• Cloud Model
• Bohr Model
• Rutherford Model

Tags

NGSS.MS-PS1-1

Which model involved gold foil?

• Thomson Model
• Rutherford Model
• Cloud Model
• Bohr Model

While making his model of an atom, what structure did Rutherford discover (containing protons and neutrons)?

• the Nucleus
• the Electron Cloud
• the quarks
• the atomic mass

Tags

NGSS.HS-PS1-8

According to the Bohr Model, electrons are only found in specific orbits around the nucleus called __________________________

• Energy Levels
• Electron Lanes
• Electron Places
• Atomic Mass

Which model is this?

• Thomson Model
• Rutherford Model
• Cloud Model
• Bohr Model

Tags

NGSS.MS-PS1-1

Which model of the atom proposed that atoms were positive spheres with negative electrons in them?

• Heliocentric Model
• Solid Sphere Model
• Plum Pudding Model
• Planetary Model

Tags

NGSS.MS-PS1-1

Who was the Greek philosopher who called the smallest particle of matter as "atom"?

• Democritus

• Aristotle

• J.J Thompson

• Einstein