Questions Describe the trend in nuclear Charge and effective nuclear charge
of halogen down the group.​

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

Is powdered sports drink ionic or covalent ? 10pts !

How can the periodic table be used to predict the behavior of elements?