Periodic Trends (easyish)
How did the first table of elements organize itself by...
What is atomic mass?
Does electronegativity increase or decrease going down?
Decreases
What are columns called on the periodic table?
Groups or families
Most elements on the periodic table are: metals, nonmetals, or metalloids
metals
name the three classes of elements
metals/ nonmetals/metalloids
What are valence electrons?
Outermost electrons of an atom
How is atomic radius calculated?
two atoms of the same element are bonded together and the distance between their nuclei is halved
OR
nucleus to outer edge of atom
What are rows on the periodic table called?
periods
What is the name of the most reactive metals?
Alkali Metals
Does Ionization energy increase or decrease going down?
Decreases
What causes atomic radius to increase when heading down a group from top to bottom?
energy shells/levels are added
kinda right: gets way more electrons
What is the only nonmetal in group 1?
Hydrogen
Name two physical properties of metals.
Ductile, malleable, shiny, conductive, etc.
What is Electronegativity?
Ability of an atom to attract electrons
What causes ionization energy to go up from left to right in a period?
The electronegativity is high and atoms over there will not want to release their electrons
Name of elements in groups 3-12
What are transition metals?
What family is the most reactive nonmetals?
Halogens
What is Ionization Energy?
Energy needed to remove an electron from the atom
Does atomic radius increase or decrease going across right on the P.T.?
Decreases
This element is both a halogen and metalloid...
Astatine?
Which group is slightly less reactive than Alkali metals but still highly reactive?
Alkaline earth metals