Atomic Structure Flashcards
(44 cards)
Charge And Mass Of A Proton
Charge = Positive Mass = 1
Charge And Mass Of A Neutron
Charge = N/A Mass = 1
Charge And Mass Of A Electron
Charge = Negative Mass = Very Small
Where Are Protons And Neutrons Found
In The Nucleus
Where Are Electrons Found
In A Shell Outside The Nucleus
Radius Of The Atom
10 ^-10
Radius Of The Nucleus
10^-14
How Can Electrons Change Orbit
By Absorbing Or Emitting Electromagnetic Radiation
How To Work Out The Neutrons In An Atom
Mass NO - Proton NO = Neutron NO
What Charge Is Given When Removing An Electron
Positive Ion
What Charge Is Given When Gaining An Electron
Negative ion
Definition Of An Isotope
Same Number Of Protons Diff Number Of Neutrons
What Did Democritus Discover
The Smallest Part Of An Element Is An Atom
When Was The Electron Discovered
1897
Who Made The Plum Pudding Model
JJ Thompson
What Did The Plum Pudding Model Show
The Atom is an even spread of Positive charge throughout the atom with electrons dotted inside
What Did The Alpha Particle Experiment Show
That the Atom is mostly empty space
Why did Some Alpha Particles Deflect
The Nucleus Has a Positive Charge
Why Did Some Rebound
The Atom Contains Mass
When Was the Nucleus Discovered
1932
What is radioactivity
When a unstable nucleus emits a particle or radiation and is not affected by anything
Where does radioactivity take place
In the nucleus
What is an alpha particles charge
+2
What element is the alpha particle
4
He
2
