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Which of the following are signs that  a chemical reaction may have occured?  Select all that apply

Which of the following represents a hydrocarbon with  a double bond in it?

What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?

(Surveys and Questionnaires) Which should not be explained early when presenting results?

Carlos says an atom has 3 electrons in the first shell and 4 electrons in the second shell. Someone should tell Carlos that …

Match each substance to the correct symbol in a reaction equation at normal room conditions.

Select the correct order for the hierarchy of biological organization (from the the most complex to the least): 

(Interviews) If the purpose of the interview is to build relationships, what kinds of notes are needed?

(Surveys and Questionnaires) What should your survey design begin with that will make compiling results much easier in the end?

Choose all of the following that are examples of chemical reactions (chemical changes).