Hey guys please help me its due tonight! Super easy

What term describes technology that operates on an atomic level

Which of the following units is not an official si unit

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.