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Unit 4
Basic Chemistry
30
Biology
10th Grade
02/09/2009

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Cards

Term
Atom
Definition
Basic Building block of matter
Term
Proton
Definition
Has a positive charge
Term
Neutron
Definition
Has a neutral charge
Term
Electron
Definition
Has a negative charge
Term
Atomic Nucleus
Definition
Contains protons and neutrons
Term
Electron Cloud
Definition
Surounds the atomic nucleus and contains electrons
Term
Element
Definition
Substances made entirely of the same matter
Term
Atomic Number
Definition
Tells the number of positive charged units in the nucleus
Term
Atomic Mass/Mass Number
Definition
The atoms weight
Term
Daltons
Definition
Weight used to describe an atom
Term
Molecule
Definition
A combination of two or more atoms or elements
Term
Compound
Definition
Two or more elements combined in definite proportions
Term
Mixture
Definition
Combination of sibstances that are physically mixed, but don't form a chemical bond
Term
Homogeneous
Definition
Mixture that has particles that are spread out evenly
Term
Heterogeneous
Definition
Mixture that has particles that are not spread out evenly
Term
Solution
Definition
Any Homogeneous mixture, usually liquid
Term
Solvent
Definition
The liquid substances that makes up the bulk of the solution
Term
Solute
Definition
The substance dissolved in the solvent, can be liquid, solid, or gas
Term
Suspension
Definition
A mixture that separates when left still
Term
Colloidal Dispersion
Definition
Occurs when particles are too small to see with your eyes
Term
Lock and Key
Definition
Only certain sustrates can bond with certain enzymes
Term
Enzyme
Definition
Are organic catalyst
Term
Peptide Bond
Definition
The bond between two amino acids is a peptide bond
Term
Chemical change
Definition
A change in which a chemical bond takes place
Term
Catalyst
Definition
Chemical agent that changes the rate of a reaction without being consumed by the reaction
Term
Physical change
Definition
A change in which no physical bond takes place
Term
Carbohydrates
Definition
Are biological molecules composed of carbon, oxygen and hydrogen. Primary energy source. aid in cell to cell signaling. 1:2:1
Term
Proteins
Definition
In structural parts of the cell and tissue. In hormones. Contained in antibodies
Term
Organic
Definition
compound that contains carbon
Term
Inorganic
Definition
compound that doesn't contain carbon
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