Chemistry Study Guide

Give the name & charge for the 3 subatomic particles in an atom.
What is the smallest particle of matter that keeps all the same properties of oxygen?
What is an element?
All matter in the universe is made of what?
Where are electrons found in atoms?
Electrons will move to a higher energy level whenever they absorb what?
If atoms are packed tightly together is the substance a solid, liquid, or gas?
If the outer energy level of an atom is filled with electrons, will it react?
If an atom only has 6 outer electrons, will it gain or lose electrons to form an ionic bond?
If an atom has 2 outer electrons, will it gain or lose electrons to form an ionic bond?
Why is carbon able to form four covalent bonds with other atoms?
Are covalent bonds formed from sharing or transferring electrons between atoms?
Where are the electrons found that are involved in ionic & covalent bonding?
What is an atom called that has lost or gained electrons?
Are ionic bonds formed from sharing or transferring electrons between atoms?
If the products have less energy than the reactants in a chemical reaction, is the reaction endergonic or exergonic? 
Has energy been released or absorbed if the products of a reaction have less energy than the reactants?
Chemical reactions drive all of the activities within __________.
Sketch a graph showing an exergonic reaction. 
What helps reduce the amount of activation energy required in chemical reactions?
Biological catalysts are called __________.
Cells contain thousands of different enzymes. True or False
Has a molecule been oxidized or reduced when it gains an electron & hydrogen ion?
Oxidation-reduction reactions in organisms allow the passage of _________ from molecule to molecule.
__________ is determined by the number of particles of a substance in a solution.
If a solution is neutral, what is true about its number of hydrogen & hydroxide ions?
If a solution is alkaline or a base, does it have more hydroxide or hydrogen ions?
If a solution has a pH of 11, is it an acid or base?
Solutions with a pH less than 7, would be acids or bases?
_________ in organisms help prevent great changes in pH.

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