Two charged particles with the same-signed electrical charge repel one another. While two charged particles with opposite-signed electrical charge attract one another.

A north magnetic field pole can exist without a south magnetic field pole (monopole), similar to a positive or negative charge.

What unique stone was first discovered in the Greek province of Magnesia which had magnetic properties when rubbed against iron?

Describe how a permanent magnetic (such as a bar magnet) can be made.

[First] is the process of an atomic nucleus triggered, or spontaneously, splitting into constituent pieces. While [Second] is the process of atomic nuclei combining into more complex nuclei.

Among the three distinct radioactive decays of nuclear isotopes: [first] decay emits a helium nucleus. [second] decay emits an electron. And [third] decay emits a high-energy photon.  

Each element in the periodic table of elements has with the atomic symbol a(n) BLANK which tells the reader how many protons are in the nucleus of that atom.

How are resistance and conductivity mathematically related?

[First] are changes in a molecule’s (or atom’s) physical characteristics such as hardness, density, color, etc. While [second] are the changes in a molecule’s (or atom’s) chemical structure or bonding, which imply that a chemical reaction has occurred.

True/False Defend: There is no difference between an angular fall and a collapsing fall.