Atomic Theory
The first person to theorize about atoms.
Who is Democritus?
These subatomic particles have a mass of 1 amu and a positive charge.
What are protons?
The first scientist to arrange the elements into a periodic table.
Who is Dmitri Mendeleev?
The electrons that Bohr Models represent.
What are all electrons?
The electrons that Lewis Dot Diagrams represent.
What are valence electrons?
This atomic model tells us that electrons float around a positively charged mass.
What is the Plum Pudding Model?
These subatomic particles have a mass of 1 amu and no charge.
What are neutrons?
That atomic mass of helium.
What is 4.002?
The number of electron shells needed for each Bohr Model.
What is equal to the period?
The number of electrons needed for each Lewis Dot Diagram.
What is determined by the group?
This atomic model tells us that electrons do not follow a predictable path but have regions where they are likely to be found.
What is the Electron Cloud Model?
That atomic number.
What is the number of protons?
How elements are arranged on the current periodic table?
What is by increasing atomic number?
The number of electrons needed for each Bohr Model.
What is equal to the atomic number?
This negatively charged subatomic particle was discovered before the nucleus was discovered.
What are electrons?
Protons + Neutrons
What is mass number?
This class of element is found to the left of the zig-zag line.
What are metals?
This is an atom.
What is the smallest piece of matter that still maintains the properties of an element?
# of protons - # of electrons
What is the charge of an atom?
Atoms with the same number of protons but a different mass.
What are isotopes?