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;
54 Cards in this Set
- Front
- Back
where are protons, neutrons and electrons in an atom?
|
protons and neutrons are clumped together in the center (nucleus). Electrons orbit around the nusleus like the planets orbit the sun in space.
|
|
What determines the vast majority of the characteristics in an atom?
|
The number of protons & electrons.
|
|
What does the number after an atom mean/signify?
|
The sum of the protons & nutrons.
|
|
What is the difference between an element and an atom?
|
An eliment contains all atoms that have the same number of protons (and therefore the same number of electrons), regardless of the number of neutrons. An atom is a single entity, determind by its number or protons, electrons and nutrons.
|
|
How many electrons are in an atom that has 32 protons?
|
32, this is because every atom has the same number of protons and electrons!!
|
|
How many atoms total are in a molecule of c3h8o?
|
3
8 + 1 ------------ 12 |
|
Identify the folowing as an atom, ekement, or molecule:
a. h2co b.nitrogen- 14 c. P |
a. is a molicule
b. atom c. eliment |
|
If you add molecules ofaliquid, will it turn into a gas or a solid?
|
Gas.
|
|
A chemist wants to study diffusion. should a semipermeable membranebe used?
|
yes
|
|
What kind of reaction is used for building disaccharides, polysaccharides, fats, and proteins?
What kind of reaction can break these substances down? |
Dehydration
Nydrolysis |
|
What is the basic building blacks for proteins, lipids, and polysaccharides?
|
proteins link together with amino acids
polysaccharides link together with monosaccharides lipids link to glycerol fatty acids |
|
what is the "lock and key" theory of enzyme action?
|
The sucrose fits into the sucrase like a key fits into a lock, this view of how an enzyme works is often called the lock and key theory of enzyme action
|
|
what is the basic part of a nucleotide?
|
doexyribose, phosphale group, and a nucleotide base
|
|
Atom
|
the basic building blocks of matter
|
|
Matter
|
anythng that has mass and takes up space
|
|
Model
|
an explanation or representation of something that cannot be seen
|
|
Elament
|
A collection of atoms that all have the same number of protons
|
|
Molecules
|
Chenicals that result fromatoms linking together
|
|
Phisical change
|
a change that affects the apperance but not the chemical makeup of a substance
|
|
Chemical change
|
A change that alters the makeup of the elements or molecules of a substance
|
|
Phase
|
One of three forms - solid, liquid, or gas - which every substance is capable of attaining
|
|
Diffusion
|
the randome motion of molecules from an area of high concentration to an area of low concentration
|
|
Concentration
|
A mesurement of how much solute exists within a certain volume of a slovent
|
|
Semipermeable Membrane
|
A membrane that allows some molecules to pass through but does not allow other molecules to pass through
|
|
Osmosis
|
the tendency of a solvent to travel across a Semipermeable Membrane into areas of higher soluts concentration
|
|
Organic molecule
|
a molecule that contains only carbon and amy of the following: hidrogen, oxygen, nitrogen, sulfer, and/or phosphororous
|
|
Biosynthesis
|
the prosess by which living organisme produce larger molecules from smaller ones
|
|
Monosaccharides
|
simple carbohicrates that contain 3 to 10 carbon atoms
|
|
Disaccharides
|
carbohydrstes that are mad up of two Monosaccharides
|
|
Polysaccharides
|
Carbohydrates that are made up of more than two Monosaccharides
|
|
Dehadration reaction
|
a chemical reaction in which molecules combine by removeing water
|
|
Hydrolysis
|
Breaking down complex molecules by the chemical addition of water
|
|
hydrophobic
|
lacking any affinity to water
|
|
saturated fat
|
A lipid made from fatty acids that have no double bonds between carbon atoms
|
|
Unsaturated fat
|
A lipid made from fatty acids that have at least one double bond between carbon atoms
|
|
Peptide bond
|
a bond that links amino acids together in a protene
|
|
Hydrogen bond
|
A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom, especially a nitrogen, oxygen, or flourine atom, usually of another molecule.
|
|
Cytology
|
The study of cells
|
|
Reproduction
|
Producing more cells
|
|
Cytology
|
The study of cells
|
|
Absortion
|
The transport of dissolved substances
|
|
Cell wall
|
A rigid structure on the outside of certain cells, usually plant and bacteria cells
|
|
Cell wall
|
A rigid structure on the outside of certain cells, usually plant and bacteria cells
|
|
Cytology
|
The study of cells
|
|
Cell wall
|
A rigid structure on the outside of certain cells, usually plant and bacteria cells
|
|
Digestion
|
The break down and absorbed substance
|
|
Respiaration
|
The break down of food molecules with a release of energy
|
|
Excertion
|
The reamovail of soluble waste materials
|
|
Egestion
|
The reamoval of nonsliuble waste materials
|
|
Secretion
|
The release of biosynthesized substance
|
|
Homeostasis
|
Maintaining the status quo
|
|
Reproduction
|
Producing more cells
|
|
Cytology
|
The study of cells
|
|
Cell wall
|
A rigid structure on the outside of certain cells, usually plant and bacteria cells
|