Periodic Arrangement
The horizontal rows of the periodic table
Periods
Strontium is classified as this
Alkaline Earth Metals
JJ Thompson
Neutral
A nonmetal and a metal would form this type of bond
Families/Groups
Iodine is classified as this reactive group of nonmetals
Halogens
This man coined the term "atom" as a piece of matter that is cut in half continually until it cannot be cut anymore
Democritus
These two subatomic particles can be found in the nucleus of the atom
protons and neutrons
ClBr2 represents this type of chemical bond
Covalent
Elements in the same families or groups have the same number of these
Valence electrons
Argon belongs to this regally name group
This man used the gold foil experiment to discover the nucleus of the atom
35
Write the three different ways that you can represent an isotope of Uranium with a mass number of 235.
U 235, Uranium 235 and the symbol one that I can't type into the answer box...
Elements in the same period have the same number of these
Energy levels
This group is comprised of the elements in groups 3-12
Transition Metals
This man refined Rutherford's model and explained how the electrons stayed in orbit and remains to be one of the models we use today.
Niels Bohr
Where is the majority of the atom's mass located?
nucleus
This is what a Bohr Model of oxygen looks like
This man is credited with creating the Periodic Table
Dimitri Mendeleev
The Lanthanide and Actinide Series comprise this group of elements
Rare Earth Metals
This man said that all matter was made of tiny particles called atoms and described them as indestructible and unchangeable
Dalton
The number of electrons held by each of the first three energy levels
2, 8, 18
If you have isotope C-14, this would be the number of neutrons in the nucleus
8