Chlorine gas (cl2) forms when two chlorine atoms share an electron. what type of bonding is present in chlorine gas? a. ionic b. covalent c. hydrogen d. metallic

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Vessels draining the myocardium of the heart, open primarily ,into which chamber?