Atoms tend to undergo chemical reactions that decrease their stability FALSE.
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Transcript of Atoms tend to undergo chemical reactions that decrease their stability FALSE.
![Page 1: Atoms tend to undergo chemical reactions that decrease their stability FALSE.](https://reader036.fdocuments.in/reader036/viewer/2022062309/5697c0121a28abf838ccc4c4/html5/thumbnails/1.jpg)
Chapter 2 Review
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True or False?
Atoms tend to undergo chemical reactions that decrease their stability
FALSE
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True or False
Mass # = # of protons + # of electrons
FALSE
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True or False
Oxidation occurs when a reactant loses electrons
TRUE
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True or False
The products of an endergonic reaction posses less energy than the reactants
FALSE
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What are the charged particles that move around an atom’s nucleus?
Electrons
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This type of bond results when atoms share one or more pairs of electrons
Covalent
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What do we call the amount of energy needed to start a chemical reaction?
Activation energy
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Chemical reaction that can proceed forward and backward
Reversible
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One water molecule will bond to another water molecule by what type of bond?
Hydrogen
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What is the fundamental unit of matter?
Atom
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How many electrons can the energy level closest to the nucleus hold?
2
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What types of bonds are broken when salt dissolves in water?
Ionic
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A basic solution has a excess of what type of ions?
Hydroxide
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True or False?
Catabolism is an example of an endothermic reaction
FALSE
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Isotopes contain the same number of protons, but a different number of which other subatomic particle?
Neutrons
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True or False
Activation energy is the amount of energy available to do work
FALSE
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If pH is increasing from 2 to 6, which ion is increasing in concentration?
Hydroxide
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Draw a Bohr diagram and a dot diagram for the following elements› Carbon› Nitrogen
Be able to draw these for various elements!
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Free hydrogen ions react with a water molecule to form what type of ion?
Hydronium
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What ultimately determines how elements bond to form compounds?
Number and arrangement of electrons in energy levels
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What do we call a substance able to neutralize small amounts of acids and bases?
Buffer
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Substance dissolved in a solution
Solute
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Amount of solute / fixed amount of solvent = ?
Concentration
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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