2.1
2.2
2.3
2.4
2.5
100

a____________ is a pure substance that is distinguished from all other matter by the fact that it cannot be created or broken down by ordinary chemical means

element 

100

a weak or strong electrical attraction that holds atoms in the same vicinity is a _________

bond 

100

this form of energy is the potential energy that energy is stored in chemical bonds 

chemical energy

100

A ________ is a substance that does not contain both carbon and hydrogen 

inorganic compound

100

glucose, fructose galactose, deoxyribose and ribose are the five ______________

monosaccharides 

200

The most abundant element in the human body is______________

oxygen @ 65%

200

an atom that has either a negative or positive electrical charge is called a(n)__________

ion
200

chemical reactions that release more energy than they absorb are considered ____________

exergonic 

200

water, salts, acids and bases are all groups of ________ essential for human life

inorganic compounds 

200
a __________ is a pair of monosaccharides 

disaccharides 

300

the sum of the number of protons and neutrons in its nucleus 

mass number 

300

a negatively charged ion is called a ___________

anion 

300

this type of energy supplies electrolytes in cells and body fluids it is called ___________

electrical energy 

300

A __________ is a substance that contains both carbon and hydrogen 

organic compound 

300

this signaling molecule is derived from unsaturated fatty acids 

prostaglandins 

400
a _________ is one of the different forms of an element, distinguished from another by the different number of neutrons 

isotopes 

400

A cation is __________

positively charged ion 

400

the energy I use to climb a mountain can categorized as_______-

kinetic energy 

400

when a solute is distributed evenly throughout a solution it can be considered....

homogeneous 
400

a _________ is an organic molecule composed of amino acids linked by peptide bonds 

protein 

500

All atoms are at its most stable state when there are 8 _______ in their _________ shells. 

electrons/ valence  

500

this type of bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom

hydrogen bond 

500

__________ energy is energy emitted and transmitted as waves rather than matter 

Radiant energy 

500

a pH of 10 would indicate that the substance is ______________

alkaline or basic 

500

DNA is organized in a _______________ while RNA is organized in a ____________

double helix and single helix 

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