When writing formulas what must be equal before the formula is correct

**40** points asapessay questions (10 points possible) clear image of next, create your own scenario. it can be one of your own real experiences or one you make up. use imagery in your writing to give your instructor a the setting and an action taking pace in your writing explain the structure and functions of the skin at work in your scenario. !

Compare and contrast physical changes with chemical changes.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)