2. Mendeleev 3. 4. Moseley 5. Row Series Period 6. Column
GroupFamily 7. Periodic Law 8. When elements are arranged by atomic
number, there is a periodic pattern in their physical and chemical
properties. 9. Valence Electrons 10. 11. Periodic Trends 12. Atomic
Radii
Half of the distance between two bonded nuclei
Down Group Across Series Increases Shielding Decreases Greater
nuclear charge as well as more valence electrons. 13. Ionization
Energy
The energy required to remove the outermost electron
Down Group Across Series Decreases Shielding Increases Moving
toward non-metals that seek stability of octet by gaining electrons
14. Electronegativity
A measure of an atoms attraction toward electrons while in a
chemical bond
Down Group Across Series Decreases Shielding Increases Moving
toward non-metals that seek stability of octet by gaining
electrons
