Lithium has three protons. which model shows a neutral atom of lithium?

In adding up charges, you can ignore the neutrons ... they have no charge

either way.  They're NEUTRal, which is why they're called NEUTRons.

That leaves us with 3 positive protons and 3 negative electrons.

                      +3  -3  =  0 .

The atom as a whole is neutral ... its net charge is zero.

Explanation:if this isn’t right I am sorry

ok

explanation:

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.