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24 Cards in this Set
- Front
- Back
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The positively charged particles in the nucleus of an atom are called?
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protons
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Atomic number of an element is?
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number of protons
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atomic mass of an element is?
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number of protons, neutrons, and electrons
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Element carbon has 6 protons and 6 neutrons in its nucleus. How would you represent cabon-14 isotope
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6 protons, 8 neutrons
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How do atoms interact with one another to form chemical bonds?
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they share or transfer valence electrons
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Choose the answer that correctly lists the choices in order in INCREASING complexity?
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atoms<molecules<compounds
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What drives bonding between atoms?
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completeing electron valence shells
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When two atoms ahve different electronegativities, electrons can be shared unequally to form what kind of chemical bond?
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polar covalent bond
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Which type of bond forms between a hydrogen atom of one water molecule and oxygen atom of a second water molecule?
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hydrogen bond
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Type of chemical bond that forms between a cation and an anion is what kind of bond?
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ionic bond
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What is another name for a decomposition reaction?
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catabolism
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What type of reaction involves two small molecules being joined by a covalent bond with the release of water molecule?
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dehydration
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What type of energy reaction is photosynthesis?
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endothermic
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A+BC-->AB+C is what kind of reaction?
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exchange reaction
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Three important properties of water?
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water adhesion
absorb significant amount of heat, without changing temp excellent solvent |
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How do antacids relieve indigestion?
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increase the pH of the stomach to lessen the acidity
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What is the substance that can be added to amocrobial culture to prevent drastic changes in pH
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buffers
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Acids donate
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H
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Bases accept
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H
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Concentration of H in milk of magnesia, which has a pH of 10, is ___ times lower than that of seawater, which has a pH of 8.
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100 times
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What macromolecules is a polymer of amino acids?
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protein
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what type of macromolecule is a polysaccharide?
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carbohydrate
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Sequence of amino acids in a polypeptide chain is refferred to as the ____ of a protein?
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primary structure
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What is the most important short-term energy storage molecule?
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atp
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