Two atoms of element a unite to form a molecule with the formula a2. the bond between the atoms in the molecule is 1) electrovalent 2) ionic 3) nonpolar covalent 4) polar cavalent

How much energy moves onto the next level, in an energy pyramid

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

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