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Bio ch 2 fixed
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What are the 3 particles that make up an atom?
protons, neutrons, electrons
Which particles move in the space around the nucleus?
ELECTRONS
What is atomic number?
Proton Number
What is a mass number?
proton number + neutron number
What is the definition of isotope
Isotopes have the same number of protons and are the same element but have a different number of neutrons in the nucleus
What is a compound?
A SUBSTANCE FORMED BY THE CHEMICAL JOINING OF TWO OR MORE ELEMENTS IN DEFINITE
AMOUNTS
How is a positive ion formed?
AN ATOM LOSES ONE OR MORE ELECTRONS
How is a negative ion formed?
AN ATOM GAINS ONE OR MORE ELECTRONS
What creates a covalent bond?
SHARING OF ELECTRONS between atoms
What happens during a chemical reaction?
ATOMS REARRANGE
Given a generic reaction A + B -> C + D what chemicals are the reactants?
A&B
What is the definition of a chemical reaction?
The process that changes one set of chemicals into another set of chemicals.
For the reaction profile graphs, how can you identify a reaction that absorbs energy?
THE CURVE RAMPS UPWARDS/THE PRODUCTS HAVE A HIGHER ENERGY THAN REACTANTS (see p. 51)
What is the atomic composition of water?
2 HYDROGEN ATOMS linked to 1 OXYGEN ATOM
In the reaction below (the synthesis of water), what is water?
2 H2 + O2 2 H2O
THE PRODUCT
Describe the polarity of the water molecule.
THE OXYGEN HEMISPHERE IS SLIGHTLY NEGATIVE AND THE HYDROGEN HEMISPHERE IS SLIGHTLY
POSITIVE.
In sugar water, what is the sugar?
A Solute
How would you classify a mixture made by adding salt to boiling water?
A solution
When any cells are mixed in water, what forms?
A suspension
What are acidic phs?
Below 7
What are basic phs?
Above 7
Which pH is neutral?
7
How are acids destribed?
Have more H+ than OH- in solution
How are bases described?
Have more OH- than H+
How are neutral solutions described?
Have equal concentrations of H+ and OH-
What makes Carbon Special?
Carbon has a valence of 4 and can bond to one another and form a lot of different structures
How many bonds can Carbon Form?
Four
Which are the predominant atoms in biomolecules?
C = carbon/H = hydrogen/O = oxygen/P = phosphorus/N = nitrogen
Amino acids link to form a protein. What is formed when simple sugars link?
Starch
What are 3 key functions of proteins?
-They help fight disease (ex. Anitbodies are proteins.)
-They control the rate of reactions (ex. Enzymes are proteins.)
-They move substances into or out of cells. (ex. Membrane proteins can act as pumps.)
What are 3 falsehoods/un-truths about catalysts?
-Catalysts slow down the rate of reaction.
-All catalysts are enzymes
-Catalysts are consumed or used up during a chemical reaction.
What are basic accurate facts about enzymes?
-Enzymes work best at a specified pH.
-Enzymes are proteins.
-The shape of the enzyme allows it to do its job.
Author
Danielvu28
ID
129090
Card Set
Bio ch 2 fixed
Description
Ac
Updated
2012-01-20T00:49:44Z
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