Physical Science Crossword Puzzle

QUESTIONS LIST:

• atomic mass unit: a unit of mass that describes the mass of an atom or molecule
• nucleus: at atom's central region, made up of protons and neutrons
• electron: a subatomic particle with a negative charge
• mass number: the sum of the numbers of protons and neutrons in an atom
• valence electron: an electron found in the outermost shell of an atom. determines chemical properties
• photon: a light particle
• isotope: an atom that has the same number of protons, but a different number of neutrons, as other atoms of the same element
• proton: a subatomic particle that has a positive charge. located in the nucleus.
• orbital: a region in an atom with a high probability of finding electrons
• neutron: a subatomic particle that has no charge. located in the nucleus.
• mole: the si base unit used to measure the amount of a substance
• atomic number: an identifying number of an element equal to the number of protons in a single atom