atoms tend to undergo chemical reactions that decrease their stability false
TRANSCRIPT
Chapter 2 Review
True or False?
Atoms tend to undergo chemical reactions that decrease their stability
FALSE
True or False
Mass # = # of protons + # of electrons
FALSE
True or False
Oxidation occurs when a reactant loses electrons
TRUE
True or False
The products of an endergonic reaction posses less energy than the reactants
FALSE
What are the charged particles that move around an atom’s nucleus?
Electrons
This type of bond results when atoms share one or more pairs of electrons
Covalent
What do we call the amount of energy needed to start a chemical reaction?
Activation energy
Chemical reaction that can proceed forward and backward
Reversible
One water molecule will bond to another water molecule by what type of bond?
Hydrogen
What is the fundamental unit of matter?
Atom
How many electrons can the energy level closest to the nucleus hold?
2
What types of bonds are broken when salt dissolves in water?
Ionic
A basic solution has a excess of what type of ions?
Hydroxide
True or False?
Catabolism is an example of an endothermic reaction
FALSE
Isotopes contain the same number of protons, but a different number of which other subatomic particle?
Neutrons
True or False
Activation energy is the amount of energy available to do work
FALSE
If pH is increasing from 2 to 6, which ion is increasing in concentration?
Hydroxide
Draw a Bohr diagram and a dot diagram for the following elements› Carbon› Nitrogen
Be able to draw these for various elements!
Free hydrogen ions react with a water molecule to form what type of ion?
Hydronium
What ultimately determines how elements bond to form compounds?
Number and arrangement of electrons in energy levels
What do we call a substance able to neutralize small amounts of acids and bases?
Buffer
Substance dissolved in a solution
Solute
Amount of solute / fixed amount of solvent = ?
Concentration
A pH is increasing from 4 to 9› Which ion is increasing?› How many times more of this ion is present
at pH of 9?
Hydroxide 105 or 100,000