An object has a mass of 20 g and volume of 10 cm3. Enter the numerical value for the density of the object in units of g/cm3.

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

What effect might melting sea ice have for people who live in coastal areas?

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a