Which of the following is a method of representing atoms and the electrons in their outer energy levels? a )chemical symbol
b )chemical formula
c )electron dot diagram

Explanation for basic character?

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.

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm