Acompound is made up of iron and oxygen, only. the ratio of iron ions to oxide ions is 2: 3 in this compound. the iupac name for this compound is
(1) triiron dioxide (3) iron(iii) oxide
(2) iron(ii) oxide (4) iron trioxide

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

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

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4