names/groups
subatomic particle definitions
miscellaneous
100
The symbol for helium
What is HE?
100
nucleus
What is the center of an atom?
100
The creator of the periodic table of element
Who is Dmitri Mendeleev?
200
The symbol H
What is Hydrogen?
200
A subatomic particle with a positive charge
What is a proton?
200
The group of elements separated from the rest of the table
What are the RARE EARTH METALS?
300
The noble gases
What are HE, NE, AR, KR, XE, and RN?
300
Electron
What is a subatomic particle with a negative charge?
300
18
What is the number of columns in the periodic table of elements?
400
H, LI, NA, K, RB, CS, FR
What are the alkali metals?
400
A subatomic particle with no charge
What is a nuetron?
400
118
What is the number of known elements?
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