Atomic Structure Flashcards
4 people that discovered stuff about the atom
- dalton
- Thompson
- Rutherford
- Chadwick
What did dalton find
All elements are made up of small invisible particles called atoms
What did Thompson find
-the electron
And made the diagram called the plum pudding model
-he said that in atoms there are negative electrons embedded in a sphere of positive charge
What did Rutherford find
Protons
What did Chadwick find
Neutrons
Charge of electrons
-1
charge of protons
+1
Charge of neutrons
0
Mass of electrons
1
1840
Mass of protons
1
Mass of neutrons
1
Location of electrons
Shells
Location of protons
Nucleus
Location of neutrons
Nucleus
Radius of atoms
1x10 to the power of -10m (0.1nm)
How big is the nucleus
1x10 to the power of -14m
What is the atomic number
The number if protons and electrons
What is the mass number
The amount of protons + neutrons
Why are atoms electrically neutral
The number of protons is equal to the number of electrons
What is the same as the group number
The amount of electrons in the outer shell
What is an ion
A charged particle, they are formed whenever atoms gain or lose electrons in order to achieve a stable full outer shell of electrons
Draw diagrams to show how each element forms an ion (use periodic table)
- lithium
- magnesium
- potassium
- calcium
What is an isotope
Atoms that have the same atomic number and different mass numbers. In other word that are atoms of the same element that have different numbers of electrons
