Periodic Table Flashcards
Organized the elements based on increasing atomic number
Henry Moseley
Published the first version of the periodic table
Dmitri Mendeleev
States That the chemical properties of the elements are dependent on their atomic numbers
The periodic law
The A elements which have either s or p sublevels as their outermost orbitals
Representative elements
The B elements include the transition elements which have partly filled d sub levels and the lanthanide and actinide series which have partially filled f sublevels
Non representative elements
The net positive charge from the nucleus, as felt by an electron
Effective nuclear charge (Zeff)
Anions are ______ than neutral atoms while cations will be ______.
Bigger (more repelled)
Small
The energy required to remove an electron from a gaseous atom or ion
Ionization energy
Removing an electron is a ____ reaction
Endothermic
The trends across a period =
Electronegativity ______
Ionization energy _______
Atomic radius _____
Increases
Increases
Decreases
The trends down a group
Electro negativity _______
Ionization energy_____
Atomic radius ______
Decreases
Decreases
Increases
The energy change that occurs when an electron is added to the gaseous atom and it represents the ease with which the Atom can accept it
Electron affinity
A measure of the attraction an atom has for electrons in a chemical bond
Electronegativity
Nitrogen and the elements below it. Has a mix of everything. Forms 3 covalent bonds.
Pnictogens
Group 6a containing oxygen. Either form -2 anion or have 2 shared electron pairs and two non bonded pairs in covalent bonds.
Chalogens
