Ask your own question, for FREE!
Physics 8 Online
OpenStudy (anonymous):

3. Which of the following Group 7A elements is the most reactive? (1 point)Cl (chlorine) I (iodine) F (fluorine) Br (bromine) 4. Which of the following gases emit colors when an electric current is applied? (1 point)hydrogen and helium argon and krypton fluorine and chlorine oxygen and nitrogen

OpenStudy (anonymous):

3. is fluorine

OpenStudy (anonymous):

4 is hydrogen and helium

OpenStudy (anonymous):

4 is actually argon and krypton which is 2 of the noble gases hydrogen is not an not a noble gas so it does not react to electricity by glowing.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!