Continual eruptions occur along mid-ocean ridges, forming new sea-floor rock. The rocks closest to a mid-ocean ridge are the youngest | oldest. As you move away from mid-ocean ridge, the rocks get younger | older. This implies that crust is being consumed | produced at mid-ocean ridges.

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The rules of engagement (roe) working group is often used to (select all that apply.)

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