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Glossary of Bio2401-2A

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Created by jconrad

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Anything that occupies space and has mass


Matter

Solid,liquid & gas

3 states of matter
Definite shape & volume (like teeth & bones)

Solids
Definite volume but changeable shape (blood plasma)


Liquids

Changeable shape and volume


Gas

Capacity to do work or put matter into motion


Energy

Energy in action, energy doing work


Kinetic Energy

Stored energy, inactive energy


Potential Energy

Results from movement of charged particles, electricity


Forms of Energy:

Electrical Energy



Involved in moving, always in motion (riding a bike your legs provide the m/energy to move the pedals)


Forms of Energy:

Mechanical Energy



Energy that travels in waves (x-ray,light)


Forms of Energy:

Radiant/Electromagnetic Energy



Stored in bonds of chemical substance (some of the energy in the foods we eat convert into the energy in moving your arm)





Forms of Energy:

Chemical Energy



Energy can neither be created nor destroyed


Thermodynamics:

1st Law





Energy can be converted from one form to another, some energy is lost as heat


Thermodynamics:

2nd Law



Basic substance that has unique properties: Physical & chemical


Elements

Smallest unit of an element


Atom

One or two letter chemical element (C,carbon; O, oxygen; Ca, Calcium)


Atomic symbol

p+ bears a positive electrical charge

Protons
Neutral-no charge


Neutrons

Number of protons and neutrons

Atomic Mass Unit
Bear a negative charge equal in strength to the positive charge of the proton


Electron

Electrons moving around the nucleus in fixed, generally circular orbits


Planetary Model

Regions around the nucleus in which a given electron or electron pair is likely to be found most of the time.


Orbitals

Oxygen (O), Carbon (C), Hydrogen (H), Nitrogen (N)

4 Elements that's 96% of body weight
Number of protons in a nucleus

Atomic Number
An average of the relative weights of all the isotopes of an element

Atomic Weight
Two or more structures in an element that has the same number of protons but different number of neutrons.

Isotopes
The process of atomic decay

Radioisotopes
Two or more atoms held together by chemical bonds

Molecule
When two or more different kinds of atoms bind (two hydrogen atoms combine with one oxygen to form water)





Compound

Two or more compounds mixed together


Mixture

Homogeneous mixture (evenly mixed)

Solution
Dissimilar in different areas of the mixture (water being trapped by the molecules)

Colloid
Heterogeneous mixture, large, often visible solutes that tend to settle out.

Suspension
Parts per 100 parts of the solute in the total solution


Percent Solution

Sum of the atomic weight

Molecular weight
Any element or compound that is equal to its atomic weight, weighed out in grams.









Mole

Moles per meter


Molarity

A mole of any substance always contains exactly the same number of solute particles, that is 6.02 x 10 to the (23 power)

Avogadro's Number
Water that has two poles of charge

Dipole
Whenever chemical bonds are formed, rearranged or broken

Chemical reaction
When atoms or molecules combine to form a larger, more complex molecule


Synthesis or

Combination Reaction



Parts of the reactant molecules change partners, producing different product molecules (AB + C = AC + B)


Exchange or

Displacement Reactions



Reactions that release energy


Exergonic Reaction

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