Unit 3 Study Guide Flashcards
What was Rutherford main contribution to the study of atomic structure
He developed the planetary model for the atom, the previous model was the plum pudding model
What did William Crookes use in his experiments and what did he discover with it
He used Crookes tubes to discover cathode rays which are electrons
If a substance has 9 protons and 11 electrons what is its charge
It has a negative charge
Why is it so hard to separate one isotope from another
Because they have the same chemical properties and their weight is their only difference
What is the plum pudding model
A model were the atom itself is positively charged and there are electrons floating around inside of the atom that are negatively charged
What is the planetary model of an atom
A model that has a positively charged nucleus and negatively charged electrons that orbit it
Say which of the following is inversely proportional to the other 2 wavelength, frequency, energy
Wavelength is inversely proportional to frequency and energy
What makes one light brighter than another light of the same color
Higher amplitude
What happens when atoms absorb energy and what happens when the atom emits light
When the atom absorbs energy the electrons jump to a higher orbital and when the atom emits light the electrons go back to their ground state
What is ground state and why is it important
Ground state is the lowest energy level that electrons can be at and it is important because this is were the electrons want to be
Order the 3 partials that make up an atom in decreasing mass
Neutron is the heaviest
Proton is in the middle
Electron is the lightest
What is a physical constant
A measurable number that does not change
What is an orbital
A track that electrons follow
