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21 Cards in this Set

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Definition: Elements
atoms of all the same kind that cannot be broken down by ordinary chemical means
Number of elements known to exist
115
Which elements are synthetic and radioactive?
#43, #61, all after Uranium
which groups is mainly combined?
group IA
give an example of uncombined
H
molecules
2 or more atoms coevalently combined
List the 7 diatomics
I, Br, Cl, F, O, N, H
Group IA
Alkali Metals
Group IIA
Alkaline Metals
Group VIIA
Halogens
Group O
Noble Gases
Group 3-11
Transition Elements
GROUPS OR FAMILIES
DOWN
PERIODS OR ROWS
ACROSS
Row 6
Lanthanide Senes
Row 7
Actiniede Senes
List Metalloids
B, Si, Ge, As, Sb, Te, At
Where are Metals on the PTOE
left of the staircase
Properties of Metals:
A. Luster (Shine)
B. Good conductors of heat/electricity
C. Malleable
D. Ductile
E. High Melting Point/Boling Point
Where are Nonmetals on the PTOE
right of staircase
Properties of Nonmetals:
A. No Luster
B. Poor conducters of hear/ electricity
C/D. Brittle
E. Low Melting Point/ Boiling Point