Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
Consider an atom of sodium with an atomic number of 11 and an atomic wight of 23 How many neutrons are in this atom? |
12 |
|
|
Small organic molecules are joined to form macromolecules through _______reactions. |
Condensation
|
|
|
When an atom's outer electron shell is only partially filled, the atom is considered:________.
|
chemically unstable
|
|
|
The valence of oxigen is 2. This means that oxgyen_______________. |
will form up to two bonds |
|
|
A negatively or positively charge atom is called a/an_____________. |
aIion |
|
|
Hydrogen bonds are important in the formation of _____________.
|
Interactions between complex molecules such as proteins. |
|
|
Consider the following reaction: A+B ->AB What kind of chemical reaction does this illustrate? |
Synthesis reaction |
|
|
Organic molecules always contain___________. |
Carbon and hydrogen |
|
|
Which characteristic of water accounts for its excellent solvent properties? |
Water has a negatively charged portion and a positively charged portion |
|
|
Which quality of water accounts for its characteristic role as a reactant or product in many chemical reactions? |
Water can split into a hydrogen ion and a hydroxide ion. |
|
|
A base can be defined as __________. |
a proton acceptor |
|
|
A solution with a pH of 5 is ___________. |
acidic |
|
|
The pH of a solution reflects the hydrogen ion concentration. A change from pH 7 to pH 8 reflects a _________ change in hydrogen ion concentration. |
10 - fold |
|
|
Different functional groups confer different properties on organic molecules. For example, the hydroxyl group of alcohol is hydrophilic and thus_________. |
attracts water to it |
|
|
The realtionship between a nucleotide and a nucleic acid is similar to the relationship between an amino acid and ____________. |
a protein |
|
|
When placed in water, prhospholipids will orient themselves:__________. |
with phosphates associated with water and lipids clustered away from the water. |
|
|
Which of the following cellular functions is NOT attributed to proteins? |
Function in inheritance |
|
|
The ______ structure of proteins is the unique sequence of amino acids linked togheter. |
Primary |
|
|
The science of the interaction between atoms and molecules is called_____. |
Chemistry |
|
|
What is an Atom? |
The smallest unit of a chemical element that exhibits the properties of that element.
|
|
|
What does a nucleus consists of? |
Protons, neutrons, and electrons |
|
|
What is the number of protons in the nucleus called |
Atomic number |
|
|
What is the total number of protons and neutrons called |
Atomic weight |
|
|
Chemical elements are designated by abbreviation called |
chemical symbols |
|
|
Symbol for Hydrogen |
H = Atomic #1 = weight 1 |
|
|
Symbol for Carbon |
C = Atomic #6 = weight 12 |
|
|
Symbol for Nitrogen |
N = Atomic #7 = weight 14 |
|
|
Symbol for Oxygen |
O = Atomic #8 = weight 16 |
|
|
Symbol for Sodium |
Na = Atomic #11 = weight 23 |
|
|
Symbol for Magnesium |
Mg = Atomic #12 = weight 24 |
|
|
Symbol for Phosphorus |
P = Atomic #15 = weight 31 |
|
|
Symbol for Sulfur |
S = Atomic #16 = weight 32 |
|
|
Symbol for Chlorine |
CI = Atomic #17 = weight 35 |
|
|
Symbol for Potassium |
K = Atomic #19 = weight 39 |
|
|
Symbol for Calcium |
Ca = Atomic #20 = weight 40 |
|
|
Symbol for Iron |
Fe = Atomic #26 = weight 56 |
|
|
Symbol for Iodine |
I = Atomic #53 = weight 127 |
|
|
The chemical properties of an atom are due largely to the number of ____. |
electrons in its outermost shell |
|
|
Its made up of two or more atoms:_____ |
Molecules |
|
|
Molecules consist of at least two different kinds of atoms that are called |
Compounds |
