The main types of chemical bonds are and bonds a. adding and breaking
b covalent and ionic
c. isotonic and isometric
d sharing and transferring.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

What is the percentage composition of carbon in the compound ch4