The meaning of this symbol:
What is explosive?
The number of protons in an atom.
What is the atomic number?
A row in the periodic table.
What is a period?
The type of bond that has three pairs of electrons shared between atoms.
What is a triple covalent bond?
The study of quantitative relationships between the amounts of reactants used and products formed by a chemical reaction.
What is stoichiometry?
The relationship between temperature and kinetic energy according to Kinetic Molecular Theory?
What is kinetic energy is directly proportional to temperature?
The study of energy transformations.
What is thermodynamics?
The name of the piece of equipment used in the lab to measure volume.
What is a graduated cylinder?
The subatomic particles located in the nucleus of an atom.
What are protons and neutrons?
The name of the elements in group 17 of the periodic table.
What are halogens?
The name of PCl5.
What is phosphorus pentachloride?
The name of the conversion factor used to go from grams to moles.
What is molar mass?
The two units of concentration used in class.
What are percent by mass and molarity?
The type of reaction that releases energy in the form of heat.
What is an exothermic reaction?
The four states of matter.
What are solid, liquid, gas, and plasma?
Electrons in the atom's outermost orbitals.
What are valence electrons?
Ions with a positive charge.
What are cations?
The formula of hydrochloric acid.
What is HCl?
The name of the conversion factor used to go from moles to molecules.
What is Avogadro's number?
A heterogeneous mixture of intermediate-sized particles that does not settle out, nor can it be filtered apart.
What is a colloid?
A substance that increases the rate of a chemical reaction without being consumed in the reaction.
What is a catalyst?
A process that involves one or more substances changing into new substances.
What is a chemical change?
The overall name for s, p, d, and f.
What are energy sublevels?
The formula for the thiocyanate ion.
What is SCN-?
A reaction in which a single compound breaks down into two or more elements or new compounds.
What is a decomposition reaction?
The name of the conversion factor used to go from moles of one substance to moles of another.
What is mole ratio?
A helium balloon has a pressure of 5.00 atm at 20.0°C. Find the pressure if the temperature is increased to 40.0°C.
What is 5.34 atm?
The method used to determine reaction order by comparing the initial rates of a reaction carried out with varying reactant concentrations.
What is the method of initial rates?
The number of significant figures in 0.0052080.
What is five?
The name of this form of configuration and the element:

What is the orbital diagram for neon?
Periodic trend(s) that increases as you go across a row and decreases as you go down a column.
What are ionization energy and electronegativity?
The Lewis structure for carbon dioxide.
What is 
The molar mass of calcium chloride.
What is 110.98 g/mol?
The number of moles present in a gas sample with a pressure of 1.80 atm, a volume of 4.50 L, and a temperature of 300 K.
What is 0.329 mol of gas?
The two things necessary for a reaction to occur according to Collision Theory?
What are proper orientation and sufficient energy?
The quotient of 2.0 x 1015 and 3.0 x 102.
What is 6.7 x 1012?
The electron configuration for sulfur.
What is 1s22s22p63s23p4?
The name of Ca(NO2)2.
What is calcium nitrite?
Balance this equation: C3H8 (g) + O2 (g) → CO2 (g) + H2O (g).
What is C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (g)?
The number of bromine molecules in 5.60 g.
What is 2.11 x 1022 bromine molecules?
The volume of 1.75 M calcium hydroxide stock solution you would use to make 0.500 L of 0.250 M calcium hydroxide solution.
What is 0.0714 L?
The type of reaction that has a negative enthalpy, a positive entropy, and a negative Gibbs free energy.
What is a spontaneous reaction?
The amount of milliliters in 5.8 x 102 ML.
What is 5.8 x 1011 mL?
The Noble Gas configuration for silver.
What is [Kr] 5s24d9?
The formula for iron(III) sulfite.
What is Fe2(SO3)3?
The products of Cu (s) + Fe(NO3)2 (aq).
What is no reaction?
The mass of water produced by the complete decomposition of 4.30 g of hydrogen peroxide.
2 H2O2 (aq) → 2 H2O (l) + O2 (g)
What is 2.28 g of water?
This is the new pressure of a gas that starts at 1.25 atm, 3.40 L, and 285 K, then is compressed to 2.10 L and heated to 330 K.
What is 2.34 atm?
A reactant has a concentration of 0.500 M at the start of a reaction. After 10.0 s, its concentration is 0.300 M. Find the average reaction rate.
What is 0.0200 M/s?