physical science periodic table. periodic table groups – vertical columns and have similar...
Post on 19-Dec-2015
216 Views
Preview:
TRANSCRIPT
Physical Science
Periodic Table
Periodic table
• Groups – vertical columns and have similar properties
• Period – horizontal rows, properties vary across a period
Periodic table
Letter
A – main group elements
B – transition metals
Periodic table
Periodic table
• Alkali metals – first group,
very reactive
• Alkaline earths – second group
• Halogens – group seven (17)
very reactive
• Noble gasses – group 8 (18)
non reactive
Periodic table
Periodic Trends
Atomic Size – due to the number of shells of electrons and their attraction to the nucleus
Atoms become Smaller
Periodic Trends
Ionization energy – The energy required to remove an electron from an atom
Greater Ionizationenergy
Periodic Trends
Electronegativity – how attracted an atom is for a pair of shared electrons
more electronegative
Periodic Trends
Density of atoms – mass/volume
Greater Density
top related