A heat engine must give up energy at a lower temperature to do work. This follows from a. the Zeroth Law of thermodynamics
b. the 1st Law of thermodynamics
c. the 3rd Law of thermodynamics
d. the 2nd Law of thermodynamics

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

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

What are the major types of a chemical compound