The _____ of an element is determined by the NUMBER of PROTONS in its atom.
The number of protons equals the _____________.
Electrons are found flying around in the _________.
Electrons have a ___________ charge.
Electrons have _______ mass than protons and neutrons.
Electrons are arranged around the nucleus into ____________
the 1st Energy Level holds up to
the 2nd Energy Level holds up to
the 2nd Energy Level holds up to
___________ electrons are the electrons in the outer energy level.
Valence electrons determine an element's ___________.
Elements in the same period have the same
Elements in the same group have the same
Carbon has _____ valence electrons.
Krypton has _____ valence electrons.
Calcium has _____ valence electrons.
Aluminum has _____ valence electrons.
Nitrogen has _____ valence electrons.
Sulfur has _____ valence electrons.
Iodine has _____ valence electrons.
Oxygen has _____ valence electrons.