Identify an element as a metal or a non-metal according to its position in the Periodic
Table

When a scientific theory has been tested and proved by the scientific community, it becomes a law

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Is cutting your nails a physical or chemical change