Which of processes of water cycle occur by releasing energy

Which is true of the reactants in this displacement reaction? fe + 2hcl fecl2 + h2 a. the reactants are located to the left of the arrow in the chemical equation. b. the reactants contain 1 iron atom, 2 hydrogen atoms, and 1 chlorine atom. c. the reactants are the atoms, molecules, or compounds formed in the reaction. d. the reactants have the same physical and chemical properties as the products.

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Chromosome 17 is made of over million base pairs.