The element rubidium forms a with the charge . The symbol for this ion is , and the name is . The number of electrons in this ion is .

What is the relation between concentration of reactants and the rate of chemical reaction?

In saturated organic compounds, all the bonds between carbon atoms are called?

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?