These are the three subatomic particles that exist inside an atom.
What are protons, neutrons, and electrons?
This is the nuclear reaction that combines smaller atomic nuclei into a single, larger nucleus. This reaction is the driving force that keeps stars alive.
What is Fusion?
This is the atomic notation for deuterium, which is a Hydrogen atom with one neutron.
What is 21H ?
This is what happens to atomic radius as you go down a group of the periodic table.
What is It Increases?
This is the number that identifies an element on the periodic table.
What is Atomic Number?
This is the positively charged particle that resides in the atomic nucleus. It determines the identity of an element.
What is a proton?
This is the nuclear reaction that splits a large atomic nucleus into smaller atoms. It is used to power nuclear power plants around the world.
What is Fission?
This is the atomic notation for the most stable form of Helium.
What is 42He ?
This is what happens to atomic radius as you go to the right on the periodic table.
What is It Decreases?
This word means the center of an atom, where the protons and neutrons exist.
What is the Nucleus?
This is the negatively charged particle that resides in the orbitals of an atom. It is responsible for chemical reactivity with other atoms.
What is an electron?
Complete the following nuclear fission reaction by filling in the blank:

What is 10n ?
This is the atomic notation for Oxygen-16.
What is 168O ?
This is where the elements with the highest electronegativity are located on the periodic table.
What is the Top Right Corner? (excluding the Noble Gases)
This is what we call two versions of the same element with different atomic masses (due to different neutron counts).
Example: Carbon-12 and Carbon-14
What is an Isotope?
This is the subatomic particle with no charge that resides in the atom's nucleus. It serves a purpose of stabilizing the nucleus, to prevent radioactive decay.
What is a neutron?
Label this type of nuclear reaction as fission or fusion:

What is Fusion?
This is the atomic notation for a Nitrogen atom with 8 neutrons.
What is 157N ?
This is the primary reason why atomic radius increases as you move down a group of the periodic table.
What is electron shielding?
This is the name of the scientist that discovered the different energy levels of electrons. He also created an atomic model that highlights this discovery.
Who is Niels Bohr?
This is the number of protons, neutrons, and electrons in a neutral Oxygen-16 atom.
What is 8?
This small particle is the catalyst for a fission reaction, that is also released in the process, causing a chain reaciton.
What is a neutron?
This is the atomic notation for a Uranium atom with 146 neutrons.
What is 23892U?
Atomic Radius and Electronegativity have a ________ relationship (options: direct/inverse)
What is inverse?
This is the type of radioactive decay that releases a Helium(He) nucleus.
What is Alpha Decay?