Chemistry
The 4 most talked about atoms in biological sciences
What are Carbon, Hydrogen, Nitrogen, and Oxygen?
Hydrogen bonding would be least effective on which of the following
-a wet surface
-a surface of Hydrocarbons (lipids)
-a surface of Carbon-Nitrogen bonds
What is a surface of hydrocarbons?
The end of a water molecule that would be attracted to the Na+ (cation) in NaCl
What is the Oxygen?
What are buffers?
A charged atom (molecule)
What is an ion?
Knowing the atomic mass and atomic number can allow you to calculate _________________.
What is the number of neutrons?
Bonds between two atoms of equal electronegativity are called
What are nonpolar covalent bonds?
The type of bond that holds the hydrogens to the oxygen atom in a water molecule
What is a polar covalent bond?
The amount of (H2CO3, Carbonic acid OR HCO3-, bicarbonate ) will decrease if blood pH is raised
What is a carbonic acid?
A positively charged ion
What is cation?
Elements with the same number of valence electrons and therefore similar chemical properties can be found in the same __________________ on the periodic table
What is a column?
This type of bond involves the electrical attraction between charged atoms
What are ionic bonds?
The property of water due to the energy needed to break hydrogen bonds and change the state of liquid water
What is high heat of vaporization?
How many times more concentrated are Hydrogen ions at a pH of 7 compared to that with a pH of 6
What is 10 times ?
Negatively charged ion
What is an anion?
Changing the number of neutrons in an atom creates a(n)
What is a isotope?
What are polar covalent bonds?
A lake being colder than the surrounding air is due to this property of water
What is high specific heat?
A strong acid
-dissociates in aqueous solution
-increases the pH when added to aqueous solution
-is a strong buffer at low pH
What is dissociates in aqueous solution?
The attraction between an anion and a cation
What is an ionic bond?
Magnesium has an atomic number of 12, what is the most stable charge for a magnesium ion
What is +2?
This type of atom decays spontaneously and give off massive amounts of energy
What is a radioactive isotope?
An element that has its outermost shell completely full is considered this...
What is inert or unreactive?
Which would require the greatest amount of base to bring solution to a neutral pH
-stomach acid pH2
-coffee pH 5
-bleach pH 12
What is stomach acid?
Number of electrons involved in a double covalent bond
What is 4?