Which is a characteristic of the part of the atom marked "A"?

It contains most of the mass.
It is negatively charged
It is mostly empty space.
It is composed of electrons.

Who is better, messi or cristiano, i need this for a chemistry class. asap

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

Avariable that is not being directly tested during an experiment should be