Lecture 3

Question 1

Atom

Answer 1

Physical entity composed of SUBATOMIC PARTICLES

Question 2

Example of an atom

Answer 2

Proton ; neutron

Question 3

____ occuring elements ; _____ optimal for human life

Answer 3

92 and 25

Question 4

Big 4 Elements

Answer 4

Hydrogen ; Oxygen ; Carbon ; Nitrogen

Question 5

Big 4 make up ___% body mass

Answer 5

96%

Question 6

Big 4 Percent Split

Answer 6

Oxy 65, Carbon 18.5 , Hydrogen 9.5 , Nitrogen 3.3

Question 7

Remaining Body mass percents

Answer 7

3.7 Trace elements , .01 biomass

Question 8

Floride

Answer 8

Dental Treatment analogy

Question 9

Iodine

Answer 9

salt ( iodized salt) ; seafood

Question 10

Sillicon

Answer 10

Earth’s crust ; abrasive field

Question 11

Atomic Number

Answer 11

Protons AND Electrons

Question 12

Atomic Number gives an element its _____ properties plus examle

Answer 12

Physical , boiling

Question 13

Atomic Mass

Answer 13

Number of Protons and Nuetrons

Question 14

_____ are same as protons

Answer 14

Electrons

Question 15

Electrons must equal protons because

Answer 15

Stay neutral; cancel out etc

Question 16

Isotopes

Answer 16

Versions of an element with the same protons but different neutrons

Question 17

Isotopes atom reasoning

Answer 17

Same number of protons regardless of version BUT different # of neutrons to affect mass

Question 18

C12, C13, C14 breakdown

Answer 18

Isotopes ; 6P 6N, 6P 7N , 6P 8N

Question 19

C14 is

Answer 19

radioactive

Question 20

Energy

Answer 20

Ability to do work in a cell

Question 21

3 Kinds of Cell Work

Answer 21

Physical ; Chemical ; Transport

Question 22

Energy creates ____

Answer 22

ATP

Question 23

Valence Electrons

Answer 23

Outer shell of an element, determines that elements charge

Question 24

Outer shell of valence electrons leads to ______

Answer 24

CHEMICAL BONDING

Question 25

Valence electron chemical bonding must follow this rule

Answer 25

Octet Rule; Rule of 8 valence electrons

Question 26

octect rules allows ________

Answer 26

chemical balance

Question 27

Chemical Bonds

Answer 27

Covalent Bonds, Ionic Bonds, Hydrogen Bonds ; Vanderwalls Bonds

Question 28

Covalent Bonds

Answer 28

Strong ; sharing of pair of valence electrons

Question 29

These shared pair electrons are _____ shared

Answer 29

UNEQUALLY

Question 30

Polar Molecule

Answer 30

Positive and negaitve charged compound

Question 31

Non- Polar Molecule

Answer 31

NO charge ; example 2 Oxygens

Question 32

Each element during dot diagram most follow _____

Answer 32

Rule of 8

Question 33

Eletcronegativity is important becaue

Answer 33

reason for attratction for electrons which causes UNEQUAL SHARING

Question 34

EX of Eletcronegativty

Answer 34

H20, the hydrogen electrons are closer to O

Question 35

Ionic Bonds

Answer 35

a chemical bond formed when one atom gives up one or more electrons to another atom

Question 36

Cation

Answer 36

Positive charged element ( metals)

Question 37

Ex of Ionic Bond:

Answer 37

Na + Cl ; 1+ 7 = 8VAL

Question 38

Anion

Answer 38

Negative charged elements ( non-metals)

Question 39

Hydrogen Bonds

Answer 39

WEAK ; occur BETWEEN and AMONG H+ and something negative charged

Question 40

Hydrogen Bonds are ____

Answer 40

transitory

Question 41

Vanderwalls

Answer 41

WEAKEST bonds between covalent bonds