Which property decreases when the elements in group 17 are considered in order of increasing atomic number?
(1) atomic mass (3) melting point
(2) atomic radius (4) electronegativity

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work