Amolecule of alkene has the chemical formula c3h4. how many carbon-carbon double bonds are present in the molecule?

a) one
b) two
c) three.

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.