How is your eardrum similar to a real drum? It vibrates.
It is unpredictable.
It produces sound.
It is hollow.

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

Salt in oceans comes from and of rocks

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next