Organic Substances Always Contain the Elements Hydrogen and ________

Q1: The type of chemical bond formed when

Q3: A _ formula shows how atoms are

Q4: The atomic _ of an atom of

Q7: An atom that has gained or lost

Q8: Atoms that lose or gain electrons become

Q9: A chemical reaction in which pairs of

Q10: When atoms of different elements bond,they form

Q11: If two pairs of electrons are shared,the

Q40: Chemistry is the branch of science that

Q77: A substance that releases hydrogen ions in