atoms, ions, electrons Flashcards
what makes an atom neutral?
of protons = # of electrons
what do atoms try to do with their electrons?
gain or lose to become stable
what does an atom become when it gains/loses electrons?
an ion
what 2 things does the movement of electrons allow?
- atoms to form compounds
- chemical reactions to occur
what is a valence shell?
the outermost energy level
what is a valence electron?
the electrons on the outermost energy level
which electrons can move?
the valence electrons
when an atom loses electrons, what charge does it have?
positive
when an atom gains electrons, what charge does it have?
negative
what is a positively charged atom called?
cation
what is a negatively charged atom called?
anion
do metals gain or lose electrons?
lose
do non-metals gain or lose electrons?
gain
the ion formed has the same electron arrangement as ____
the closest noble gas (on the periodic table)
what is isoelectric?
atoms and ions that have the same electric arrangement
