A student is writing a formula for a compound. What must the student always remember to include? a. At least one number written large as a coefficient

b. At least two lowercase letters

c. Each element must be represented with a capital letter

d. At least one number written low as a subscript

PLEASE HELP!!

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.