What was observed when positively charged particles were radiated onto a gold atom during Rutherford's experiment because of this?

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction

At element makes up all organic compounds?

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb