History of the Atom
The man who named the atom
Who is Democritus?
Subatomic particle that has a positive charge
What are Protons?
This group will never combine with any other element naturally.
What are the Noble gases?
The period number tells you
What is the Number of energy levels?
Atoms or molecules that have a charge due to having lost or gained electrons
What are Ions?
First person to work on the periodic table
Who is Dmitri Mendeleev?
The charge of a neutron
What is (0) Neutral?
The most reactive metals.
What are Alkali metals?
The semi-conductors on the periodic table
What are Metalloids?
Positively charged ions
What is a Cations?
The man that came up with the model that says electrons travel in fixed orbits around the nucleus
Niels Bohr
The amount of electrons that can be held in the first energy level
What is 2 electrons?
The most reactive nonmetals.
What are Halogens?
The number that can be used to determine the identity of an element
What is the Atomic number?
Negatively charged ions
What is a Anions?
The experiment did Rutherford use to develop his Nuclear Model
What is the Gold foil experiment?
The mass of an atom is in the _________where the ________ are.
What is the Nucleus where the protons and neutrons are?
All elements in this group have 2 valence electrons.
What are Alkaline earth metals?
The number of protons and neutrons is represented by this number
What is the Mass number?
Isotopes are atoms of the same element with different numbers of
What are neutrons?
Explain JJ Thomson’s Plum Pudding Model.
The atom is positively charged with negative particles embedded throughout
The volume of the atom is in the _________where the _________ are.
What is the electron cloud where the e- are?
This element is the only one in its group that belongs with the group # (due to having the same # of valence e-) but not with the group name (because it is a different classification)
What is Hydrogen?
The noble gas that does NOT have 8 valence electrons
What is Helium?
Hydrogen’s most common isotope has ___ proton(s) and ___ neutron(s).
1 proton
0 neutrons