Lightest element which can exist as a single proton.
What is Hydrogen?
Italian scientist who calculated the number of atoms or molecules per one mol of any substance to be 6.022 x 1023.
What is Avogadro?

What is octahedral?
States that matter is composed of discrete units called atoms. The model of the atom representing this has changed from the Plum Pudding model to the Rutherford model, and finally the most widely accepted today, the Bohr model.
What is Atomic Theory?
Second most abundant element in Earth's crust used in solar cells, microprocessor chips, and ceramics.
What is Silicon?
Polish physicist and chemist who conducted pioneering research on radioactivity, discovering Radium and Polonium. The first woman to win a Nobel Prize and the only woman to win twice.
What is Madame Curie? What is Marie Curie?
NH4+
What is tetrahedral?
Describes delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be accurately expressed by just one single Lewis structure.
What is Resonance? What is Resonance Theory?
Alkali metal that reacts violently with water and when combined with Chlorine, forms a compound required for the transmission of nerve impulses in the body.
What is Sodium?
German organic chemist whose most famous work was on the structure of benzene, suggesting that the structure contained a six-membered ring of carbon atoms with alternating single and double bonds.
What is Kekulé? What is August Kekulé?
CO2
What is linear?
A fundamental theory in chemistry and physics which describes nature at the smallest scales of energy levels and describes the behavior of atoms and subatomic particles.
What is Quantum Theory?
Radioactive noble gas, nicknamed The Silent Killer, which poses a health hazard when collected in homes or buildings over time. (Toby tested for this in The Office.)
What is Radon?
German chemist and Nobel Prize recipient who developed a new way of esterfication with a carboxylic acid and an alcohol in the presence of an acid catalyst.
What is Emil Fischer?
BH3
What is tetrahedral?
Describes the behavior of gases based on postulates such as molecules are in a state of constant, random motion and gas particles move in a straight line until they collide with another particle or the walls of the container.
What is Kinetic Molecular Theory?
Transition metal used to make blue pigment for paints as well as alloys for magnets and heat resistant tools.
What is Cobalt?
American chemist whose work spanned across several subjects but is perhaps most well known for writing, The Nature of the Chemical Bond, and introducing the concept of orbital hybridization.
What is Linus Pauling?
PCl5
What is trigonal bypyramidal?
A model used in chemistry to predict the geometry of individual molecules. The premise being, the valence electron pairs surrounding an atom tend to repel each other and will therefore adopt an arrangement that minimizes repulsion.
What is VSEPR? What is Valence Shell Electron Pair Repulsion Theory?