Atomic Theory
Who is the Greek philosopher who thought that all matter is made of small peices that could not cut into smaller parts called "atomos"
Democritus
Horizontal rows on the periodic table are called....
Periods
The smallest particle of an element that still contains the same charactertistics of that element is called a(n)...
Atom
This element has an atomic number of 17
Chlorine
Thre are this many elements on the Periodic Table
118
The subatomic particle that J.J Thomson discovered was the...
Electrons
Vertical columns on the periodic table are called...
Groups
The positively charged particles that are located in the nucleus of an atom are called....
Protons
This element has the chemical symbol: Fe
Iron
The total number of protons and neutrons in an atom is represented by what number?
Atomic Mass
According to Rutherford, what was in the center of the atom?
Nucleus
This number will tell you the number of protons in the atom.
Atomic Number
The negatively charged particles that orbit the nucleus are called...
Electrons
This element has an atomic mass of 24
Magnesium (Mg)
Who is the scientist that is credited with creating the Periodic Table?
Dmitri Mendeleev
Which scientist thought that electrons traveled in circular paths around the nucleus?
Bohr
These elements have properties of both metals and nonmetals.
Metalloids
The neutral charge (no charge) particle that is found in the nucleus of an atom is called...
Neutron
This element is the lightest Nobel Gas
Helium
What is the name of the special electrons that are involved in chemical bonding?
Valence Electrons
The subatomic particle that James Chadwick discovered was the...
Neutron
Dmitri Mendeleev organized the Periodic Table according to...
Atomic Mass
The area where electrons are found is called...
Electron Cloud
This element is the heaviest Alkali metal
Francium
Elements in the same group share similar...
Chemical properties