Test Four Vocab Flashcards
Groups
Vertical columns of elements having similar properties
Periods
Horizontal columns
Core electrons
Electrons found in the inner electronic shells of atoms
Diamagnetism
The weak repulsion by a magnetic field of a sim stance in which all electrons are paired
Paramagnetism
The attraction into an external magnetic field of substances that have unpaired electrons
Periodic law
States that certain sets of physical and chemical properties recur at regular intervals when the Elements are arranged according to increasing atomic number
Atomic radius
Measure of the size of the atom based on the measurement of inter nuclear distance
Effective nuclear charge
Acting on an electron in an atom is the actual nuclear charge less the screening effect of other electrons in the atom
Ionic radius
Measure of the size of cation or anion based on the distance between the centers of ions in the ionic compound
Ionization energy
The energy required to remove the least tightly bound electron from a ground state atom in the gaseous state
Electron affinity
The energy change that occurs when an electron is added to an atom in the gaseous state
Periodic table
A table arrangement of the elements according to increasing atomic number that places elements having similar properties into the same vertical columns
