Atomic Theory
Which scientist thought all matter is made of small pieces that could not be cut into smaller parts called “atomos”
Democritus
The element that has an atomic symbol of H
Hydrogen
The smallest particle of an element that still contains the same characteristics of that element is called a(n)
Atom
Most of the elements on the periodic table are this type.
Metals
118
The particle that J. J. Thomson discovered
electrons
The horizontal row on the periodic table is called a
Period
The positive charged particles in a nucleus
Proton
These are poor conductors of electric current
Nonmetals
This element family has atomic numbers 89-103
Actinides
According to Rutherford, what was in the center of an atom
Nucleus
The vertical column of elements on the periodic table is called a
Group
The negatively charged particles in outside the nucleus
Electrons
This is the abbreviation of an element's name
Chemical Symbol
This element's atomic number is 40.
Zirconium
Which scientist thought that electrons traveled in circular paths around the nucleus
Bohr
The item on the table that represents the number of protons in the nucleus is the
Atomic Number
The neutral charge or no charged particle found in the nucleus
Neutron
This element's atomic symbol is Fe
Iron
This element has an atomic mass of ~32.06
Sulfur
The scientist who proved Democritus was right and that all matter is made up of atoms
John Dalton
Mendeleev arranged the elements by increasing
Atomic Mass
The center of an atom that contains both protons and neutrons
Nucleus
The total number of protons and neutrons in the nucleus is represented by the
Atomic Mass
Elements in the same __________ share similar properties based on their valence electrons.
group (or column)