What is true when a reaction has reached equilibrium? question 4 options: the concentration of the reactants is changing. the concentration of the products is changing. the reaction has stopped. the concentration of products and reactants is constant.

Its D) The concentration of products and reactants is constant.

500bc indiais the answer.

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom