chem c6 terms

atomic radii

center of nucleus to outermost boundary of electron cloud, generally

electronegativity

tendency for an atom to attract shared electrons toward it’s nucleus in a chemical bond. INCREASES as you move left to right, DECREASES as you move up to down, on periodic table, excluding noble gases.

ionic size

measure of physical size of a monatomic icon in an ionic crystal lattice. half the distance between two adjacent ions

ionization energy

min. amt of energy required to remove most loosely bound valence electron from isolated neutral atom

metalloids

elements whose properties are a mix of nonmetals & metals.

period

horizontal row in periodic table

group

vertical column in periodic table

representative elements

all elements in a groups