Which statement best describes why some materials are not magnetic?

Magnetic materials have many spinning unpaired electrons
Paired electrons spin in opposite directions, cancelling their magnetic fields
Electrons of magnetic materials are loosely held by atomic nuclei
Magnetic materials move positively charged particles to other atoms

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)

The smallest particle of an element that retains its identity in a chemical reaction. true or false

The process of a material going through a change of state from a gas to a liquid