electron confugurations test Flashcards
ground state electron
The lowest energy state of an electron
excited electron
electrons in the highest energy level
valance electron
electrons in the outer most occupied energy level
why are valance electrons important
they determine the stability of an element they determine chemical properties and are gained and lost
aufbau principle
states that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy, then they fill subshells of higher energy.
electron configuration pattern
1s2s2p3s3p4s3d4p5s4d5p6s4f5d6p7s5f6d7p
electrons fill the sub levels in what order
s with 2 e- p with 6 e- f with 14e-
hunds rule
every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin.
paulis exclusion principle
no two electrons in the same atom can have identical values for all four of their quantum numbers.
orbitals
have 2 electrons and go up by 2
noble gas notation
the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons.
orbital diagram
is a type of notation which illustrates an atom’s electron distribution and electron spin within orbitals.
how does an atom gain charge to become and ion
by losing or gaining electrons to become positive or negative, gaining means neg losing means pos
cation
positive charge
anion
negative charge
