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Chapter 5 THE PERIODIC LAW

name: Tommy Wade
Across
Atomic radii increases down a group due to e-being in orbitals.
Available to be lost, gained, or shared in the formation of chemical compounds.
Energy charge that occurs when an e- is acquired by a neutral atom.
A measure of the ability of an atom in a chemical compound to attract e- from another atom in the compound.
The physical and chemical properties of the elements are periodic functions of their atomic numbers
Belong to periods 6 and 7, respectively; set off to save space.
An arrangement of the elements in order of their atomic numbers
All radioactive, 1st four are naturally occurring on earth, remaining are laboratory made
A negative ion; atom that has has gained an e-; increase in atomic radius.
In general, e- increases across a period.
Down
Elements are in the upper right of the a block.
Atomic radii decreases left to right due to increasing positive charge of the nucleus.
In general, e- affinity decreases down a group.
Energy required to remove one e- from a neutral atom of an element.
Elements are in the lower left of the s block.
Shiny metals similar in reactivity to group 2 metals
Difficult to measure due to the fuzzy e-cloud boundary.
A repeating pattern; ex. phases of the moon, magazine publications
A positive ion; atom that has lost an e-; decreases in atomic radius.