Chapter 2 Biology Mcgraw Hill (Tams)

Front 1

if two atoms have the same stomic numbe, they are the same element and have the same ___

Back 1

inherit properties

Front 2

atoms of element with a different number of neutrons

Back 2

isotope

Front 3

___ emit energy and or subparticles

Back 3

radioactive isotopes

Front 4

radioactive isotopes spontanously decay into ___

Back 4

elements of a lower atomic number

Front 5

refers to amount of time necessary to decay half f the atoms of given sample

Back 5

half-life

Front 6

isotopes of ___ are used to date biological samples

Back 6

carbon

Front 7

loss of an electron

Back 7

oxidation

Front 8

gain of an electron

Back 8

reduction

Front 9

there are ___ naturally occuring elements

Back 9

92

Front 10

if inert atoms do not have outer level filled, then the atom is unstable

Back 10

octet rule

Front 11

bond formed by weak electrical attraction between H atoms on different molecules

Back 11

hydrogen bond

Front 12

weak ionic bonds are ___

Back 12

easily disolved

Front 13

what is the function of chemical reactions?

Back 13

break chemical bonds

Front 14

chemical reactions are influenced by ___

Back 14

-temperature
-concentration of reactants and products
-catalysts

Front 15

substance that increases rate of reaction

Back 15

catalysts

Front 16

biologically important catalysts

Back 16

enzymes

Front 17

a stable atom has ___

Back 17

no electrical charge

Front 18

the most astounding property of water is ___

Back 18

its ability to form weak chemical associations

Front 19

in a water molecule, the atoms are connected by a ___ bond

Back 19

covalent

Front 20

in water, the oxygen atom is ___ than hygrogen

Back 20

more electronegative

Front 21

water is ___ (has a distinct charge on each end)

Back 21

polar

Front 22

water clings to ___ molecules

Back 22

polar

Front 23

the attraction of water to other water molecules

Back 23

cohesion

Front 24

the attraction of molecules other than water to water

Back 24

adhesion

Front 25

responsible for suface tension on water

Back 25

cohesion

Front 26

water is ahesive to any substance with which it can form ___

Back 26

hygrogen bonds

Front 27

the amount of heat that must be absorbed or lost by one gram of a substance to change its temperature by 1 degree Celsius

Back 27

specific heat

Front 28

the heat required to vaporize one mole of a substance at its boiling point under standard pressure

Back 28

heat of vaporization

Front 29

water has a high ___ and ___

Back 29

specific heat, heat of vaporization

Front 30

water is a powerful ___

Back 30

solvent

Front 31

attracted to water

Back 31

hydrophilic

Front 32

repelled by water

Back 32

hydrophobic

Front 33

the tendency of nonpolar molecules to aggregate in water

Back 33

hydrophobic exclusion

Front 34

the process of spontaneous ion formation

Back 34

ionization

Front 35

pH measures ___

Back 35

H+ Ion concentration

Front 36

On the pH scale:
>7 is ___
=7 is ___
<7 is ___

Back 36

acidic, neutral, basic

Front 37

because the pH scale is ___, a difference of 1 in pH is ___ the H+ ion concentration

Back 37

logarithmic, 10x