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These have a positive electrical charge
Protons
These have no charge
Neutrons
Very energetic, negatively charges particles are called
electrons
Another name for the number of protons in an elements nucleus
Atomic Number
The average mass of one atom in an element
Atomic Mass
Who created the first periodic table?
Mendeleev
Name 2 or more things you would find in each square on the periodic table
Atomic Number, Atomic Mass, Chemical Symbol, Name
The 18 vertical columns in the periodic table are called
Elements in these share similar properties
Groups/Families
The horizontal rows in the periodic table are called
Periods
A material that can be pounded into shapes is said to be
malleable
A material that can be pulled out, or drawn into a long wire is said to be
ductile
conductors
Several metals are attracted to magnets and can be made into magnets. These elements, like iron, can be described as.....
magnetic
The process of reaction and wearing away is called
corrosion
The most reactive metals, in Group 1 on the periodic table are referred to as
alkali metals
The elements in group 2 of the periodic table that are less reactive than the elements in group 1 are called
alkaline earth metals
The top row of the bottom of the periodic table contains soft, malleable, shine metals called
lanthanides
the bottom row at the bottom of the periodic table contains very unstable elements, like uranium, and are called
actinides
What is the name of the elements, the don't normally react with other elements, in group 18 on the periodic table?
Noble Gasses
These have some characteristics of metals and some characteristics of non metals
metalloids
Substances that under some circumstances can carry electricity are called
Semiconductors
The state of matter where atoms are stripped of their electrons and their nuclei are packed close together
plasma
When atomic nuclei combine to form a larger nucleus, releasing huge amounts of energy in the process
Nuclear fusion
A tremendous explosion that breaks apart a massive star, producing temperatures up to 1 billion degrees celsius
supernova
Give me an example of a diatomic molecule
H20