Unit 4: Periodic Trends Flashcards
Dmitri Mendeleev
father of periodic table, organized elements by increasing atomic mass, and chemical and physical properties
Henry Mosely
organized periodic table in order of increasing atomic number. Is how the table is today
study metals vs non-metals chart page 3!
yessir
transition metals are what block?
d
inner transition metals are what block?
f
melting and boiling point increase going
towards Osmium
density increases going
towards osmium
elements increase in metallic character going
left and down towards Fr (most metallic)
atomic radius increases going
left and down
shielding
core energy levels block attraction between nucleus and outermost energy level
repulsion
electrons in inner shells repel each other
electronegativity increases going
up and right towards F (most electronegative), first three noble gases are not electronegative
ionization energy increases going
up and right
electronegativity
measure of the ability of an atom in chemical reaction can attract electrons.
ionization energy
energy required to remove one electron from a neutral atom