Atomic Theory 1

S-Orbital

P-orbital

What does the Greek model say the universe is composed of?

The atoms and the void in which they exist and move

What does Dalton’s model say all matter is made of?

Atoms

What 3 things does Dalton’s Model say that atoms are?

Indivisible

indestructible

Identical in mass and properties

What does Dalton’s model say that compounds are formed by?

A combination of 2 or more different kinds of atoms

What does Dalton’s Model say a chemical reaction is?

A rearrangement of atoms

What does the Thomson’s Model say atoms are?

Uniform spheres of positively charged matter in which electrons are embedded

What does Rutherford’s Model say about the size of negatively charged electrons?

They’re small

What does Rutherford’s Model say that negatively charged electrons do?

Orbit around the nucleus like in a small scale cosmic model

What does Bohr’s Model say electrons do?

Rotate around the nucleus in orbits that have a set size and energy

Where does Bohr’s Model say that the lowest energy is found?

In the smallest orbit

What does Bohr’s Model say the energy of the orbit is related to?

Its size

When does Bohr’s Model say radiation is absorbed or emitted?

When an electron moves from one orbit to another

What is the Heinsenberg’s Uncertainty Principle?

Orbitals are regions where electrons are likely to be found

What is the wavelength of a moving body inversely proportional to?

Its momentum

How do you calculate momentum?

Mass (kg) x velocity (m/s)

What is the motion of large bodies better described by?

Classical mechanics

What is the motion of particles better described by?

Quantum mechanics

Long wavelength has?

Small frequency and energy

Short wavelength has?

High frequency and energy