Atomic Structure
protons and neutrons
What particles determine an elements mass number?
The type of bond that forms when electrons are shared between atoms.
What is a covalent bond?
The coefficients in a balanced equation represent these
What is a mole ratio?
The transfer of thermal energy from one object to another is this
What is heat?
At equilibrium the forward and reverse reaction rates are ____
What is equal?
This scientist who discovered the nucleus with the gold foil experiment
Who is Ernest Rutherford?
A bond formed with a transfer of electrons is this
What is an ionic bond?
How many moles are in 12.0g of Carbon
What is 1 mole?
A reaction that absorbs heat
What is an endothermic reaction?
This principle predicts how a system at equilibrium responds to stress
What is Le Chateliers Principle?
The max number of electrons that can be in the second energy level
What is 8?
Molecules such as water have this type of IMF
What is hydrogen bonding?
In the reaction 2H2 + O2 --> 2H2O how many moles of H2O are produced from 4 moles of H2?
What are 4 moles of H2O?
This quantity measures the disorder of a system
What is entropy?
If a reactant is added to a system at equilibrium, the reaction shift in this direction
What is towards the products?
Calculate the number of neutrons in Cl-37
What is 20 neutrons?
This molecular geometry has a bond angle of 109.5
What is tetrahedral?
The reactant that runs out first and determines product produced
What is the limiting reactant?
A negative delta H indicates that a reaction is this
What is exothermic?
Write the equilibrium expression for N2 + 3H2 --> 2NH3
What is Kc = [NH3]2 / [N2][H2]3 ?
An atom has the electron configuration 1s22s22p63s23p5
What is Cl?
Explain why HF has a higher boiling point than HCl
What is because HF has strong hydrogen bonding while HCl does not?
If 10.0g of H2 reacts completely with excess O2 , how many grams of H2O are produced
89.3g H2O
This equation relates Gibbs free energy, enthalpy, and entropy
G = H - T S
If K = 1.0 x 10-6, the reaction strongly favors which side
What are reactants?