7)If a lab experiment is not completed, you should O A discuss the jesue with your instructor.
w
O B. sneak in after school and work alone.
O C. come in during lunch and finish while eating lunch.
O D. make up some results.

A. discuss the issue with your instructor.

Explanation:

If a lab experiment is not completed then one should discuss it with their instructor because instructor guides how to perform the experiment and also gives instructions to avoid any mis-happening during experiment.

No one should perform any experiment without their instructor in school or college as it can be dangerous to experiment with chemicals or other experimental devices without any supervision.

Hence, the correct option is "A".

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

3 1/4 %

explanation: