Chapter 5 Flashcards
The energy change that occurs when an electron is acquired by the nucleus of its own atom
Electron affinity
The energy required to remove one electron from a neutral atom of an element
Ionization energy
Radiation absorbing material that is used to decrease radiation exposure from nuclear reactions
Shielding effect
A negative ion
Anion
An atom or group of bonded atoms that has s positive or negative charge
Ion
One-half the distance between the nuclei of identical atoms that are bonded together
Atomic radius
A positive ion
Cation
A measure of the ability of an atom in a chemical compound to attract electrons
Electronegativity
A vertical column on the periodic table
Group
Horizontal rows on the periodic table
Period
An arrangement of elements in order of their atomic numbers
Periodic law