Select all THREE of the correct response about the diagram of an atom. Number 2 is a neutron.
Number 4 is an electron.
Number 1 is the atom's valence electron shell.
O Number 3 is one of the atom's protons.
Numbers 3 and 4 are the particles in the nucleus of this atom.
This is a plum pudding model of an atom.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.