Which type of bond involves valence electrons constantly moving between atoms, like a sea of electrons? a. Ionic
b. Covalent
c. Molecular
d. Metallic

Two things that biomedical has invented or innvated

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false