lesson 12 electron energy levels Flashcards
the atomic number tells us the number of protons where
in the nucleus
the atomic number also tells us the number of protons, why’s this
as in a neutral atom, the number of electrons is the same as the number of protons
electrons exist where
in energy levels
what’s another word for energy levels
electron shells
the first energy level can hold a maximum of how many electrons
2
the second energy level can hold a maximum of how many electrons
8
the third energy level can hold a maximum of how many electrons
8
how can you show the electrons in the energy levels
eg 3 electrons
[2,1]
the number of electrons in the outer energy level tells us what
the group number in the periodic table
elements with a full energy level are found in which group on the periodic table
group 0
what are elements in group 0 called
noble gases
