electronic configuration Flashcards
(11 cards)
what sort of charge do atoms have?
no overall charge, as the number of protons = the number of electrons
how many electrons can go in the first shell?
2
how many electrons can go in the second shell and onwards?
8
which number do we look at to determine the electronic configuration of an element?
the bottom number / atomic number
if an atom has gained or lost electrons, what is it now called?
an ion
what happens to atoms that lose/gain electrons to achieve a full outer shell?
they become stable but are no longer electrically neutral
how do metals form positive ions?
they lose electrons
how do non-metals form negative ions?
they gain electrons
do non-metals form negative or positive ions?
negative
do metals form negative or positive ions?
positive
why/when are atoms neutral?
they have full outer shells
