What is an Archimedean screw used for? 1. To move things from a higher level to a lower level.
2. To change the orientation of an object.
3. To change the direction of an object.
4. To move things from a lower level to a higher level.

The correct answer is c

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass