Unit 3: Atomic Structure and Atomic Models

number of neutrons=mass number - ???? 

What did Democritus believe that atoms were? 

What is the electron configuration of Copper? 

How are wavelength and frequency related?

Is the amount of energy that an electron gains always the same? 

What is the significance of the aufbau principle, the Pauli exclusion princliple, & Hund's rule

Whose atomic model could not explain the chemical properties of elements? 

Isotope 1:10.012 amu & abundance 19.91%. Isotope 2:11.009 amu & abundance 80.09%. atomic mass?

What is the amount of energy required to move an electron from one energy level to another?

What are the three types of subatomic particles? 

light quanta are called what? 

Heisenberg Uncertainty principle states that it is impossible to know exactly what 2 things?

What did Chadwick do? 

What is Dalton's first name?

What model failed to explain the energies absorbed &emitted by atoms with more than 1 electron?

What was JJ Thomson's experiment called?

What is the weighted average mass of the atoms in a naturally occurring sample of the element. 

How many protons, electrons and neutrons are in Beryllium? (the answers are in the same order)

The horizontal rows on the periodic table are called what?

How many ideas were present in Dalton's Atomic Theory?

Which is more stable? 

Why do isotopes of elements have different mass numbers? 

Why are all elements different? 

Where are the protons and neutrons located?

Who did the oil drop experiments that discovered the mass of an electron?