Unit Three - Periodic Table Flashcards
What is periodic law
When elements are arranged in order of increasing atomic number
What did Mendeleev change about the periodic table
Mendeleev arranged the periodic table by increasing atomic mass
What did Moseley change about the periodic table
Arranged the table by increasing atomic number
Which element is excluded from the Alkali metal family
Hydrogen
Name each group of the periodic table in order
Alkali metals, Alkaline earth metals, Transition metals, Boron family, Carbon family, Nitrogen family, Oxygen family, Halogens, Noble gases
Lanthanides, Actinides
What are ions
Atoms that lose or gain electrons to become stable
What is a cation
A cation is formed from a positive metal ion decreases because of energy level loss
What is an anion
When a negative nonmetal ion increases in size
What is Coulomb’s law
AR|EL
Attraction times Repulsion all divided by distance
What is ionization energy
Energy required to remove the highest energy electron
How does ionization energy change
Decreases down (electrons are far from nucleus) increases across (atomic size decreases)
What is electron affinity
Energy change when electron is added to a gaseous atom
What is electronegativity
The tendency to gain electrons
