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Electrons & Periodicity

Across
The subatomic particle which determines the atomic number
Discovered the Atomic Number of elements
Chemist who created many elements beyond uranium
Element type which are good conductors
The father of the Periodic Table
A vertical column similar elements
An element with 4 valence electrons
Refers to something that repeats regularly
Metalloid Elements used in computers
____gases are unreactive elements
Elements in Group in Group 17
Husband/wife team that discovered Radium
Represents the valence electrons around the symbol of the element(2 words)
The connections that an atom can make with another
Element type which are dull, brittle
Down
The charge of an electron
A group 16 element needed for animal life
8 valence electrons
Found the nucleu sof the atom(Gold Foil Experiment)
These rows can determine the number of shells
Splitting of an atom
These electrons are in the last shell of an atom
The elements that Mendeleev predicted
Any manmade element has an atomic number higher than this element
Element type with metal and nonmetal properties
Discovered the neutron
One of the first manmade elements
Subatomic particle used to split the atom
Regions around the nucleus containing electrons
Device used to speed up subatomic particles to produce new elements