which characteristic of an outermost shell is required for an atom to not need any electrons? A. 1 Electron B. More then 2 electrons C. More than 21 electrons D. A full

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air