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 element on the periodic table are
Metals
The smallest particle with the lowest mass in an atom is called a(n)
Electron
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
The scientist who proved Democritus was right and that all matter is made up of atoms
John Dalton
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 elements name
Atomic Symbol
If oxygen has 8 electrons and is in period 2, describe how to draw a Bohr’s model
Draw two circles around the nucleus. 1st energy level has 2 electrons the 2nd has 6.
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 elements atomic symbol is Fe
Iron
A bond that is created when atoms give/take electrons and the oppositely charged atoms attract
Ionic Bond
The particle James Chadwick discovered
Neutron
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
A bond in which atoms share one or more electrons is called a(n)
Covalent Bond