Exam 1

Question 0

what colour is phosphorus?

Answer 0

red

Question 1

what is chemistry?

Answer 1

the science of everything life

Question 2

what colour is carbon?

Answer 2

black or clear (diamonds)

Question 3

phosphorus reacting with oxygen equation

Answer 3

P+ O2 –> P2O5

Question 4

organic substances are

Answer 4

things made of carbon and hydrogen

all can burn

Question 5

non-organic substances are

Answer 5

metals

Question 6

macroscopic matter

Answer 6

what we can see normally

Question 7

particulate matter

Answer 7

what we can imagine/ see under microscope

Question 8

symbolic matter

Answer 8

represented through chemical symbols

Question 9

how many elements are currently recorded?

Answer 9

117

Question 10

what is a chemical compound?

Answer 10

something composed of two or more atoms

Question 11

what is a molecule?

Answer 11

a single element

Question 12

what is an ionic compound?

Answer 12

a bonded compound composed of two or more ions

Question 13

what is a molecule?

Answer 13

the smallest unit of a compound that retains the chemical characteristics of the compound

Question 14

what is a molecular formula?

Answer 14

the composition of a molecule

Question 15

physical properties include

Answer 15

colour, state, melting/boiling point, density (mass/unit of volume)

Question 16

what are extensive properties

Answer 16

mass dependent upon amount of substance

Question 17

what are intensive properties

Answer 17

density that does not depend upon amount of substance

Question 18

what are physical properties a function of

Answer 18

intermolecular forces

Question 19

physical properties are affected by

Answer 19

temperature

Question 20

separation of density

Answer 20

decantation, centrifugation

Question 21

separation of boiling point

Answer 21

distillation

Question 22

separation of state of matter

Answer 22

filtration

Question 23

separation of intermolecular forces

Answer 23

chromatography

Question 24

separation of vapor pressure

Answer 24

evaporation

Question 25

separation of magnetism

Answer 25

magnets

Question 26

separation of solubility

Answer 26

filtration

Question 27

chemical properties

Answer 27

chemical changes

Question 28

kinetic energy

Answer 28

energy associated with movement, thermal (particulate level), electrical (movement of electrons in a conductor), wave motion, compression (acoustic). matter is atoms and molecules in motion

Question 29

potential energy

Answer 29

an objects position, gravitational, energy stored, electrostatic energy (charged or partially charged particles), nuclear energy (fission, fusion)

Question 30

SI units (metric system)

Answer 30

``` mass-kg length-m time-s amount of substance- mol electric current - ampere - A Luminous Intensity- candela- cd ```

Question 31

precision definition

Answer 31

how well several determinations of the same quantity are found

Question 32

accuracy is reflected by the

Answer 32

experimental error

Question 33

accuracy

Answer 33

the agreement of a measurement with the accepted value of the quantity

Question 34

percent error

Answer 34

experimental value - accepted value ------------------------------------------x 100 accepted value

Question 35

giga

Answer 35

G 10^9

Question 36

mega

Answer 36

M 10^6

Question 37

kilo

Answer 37

k 10^3

Question 38

deci

Answer 38

d 10^-1

Question 39

centi

Answer 39

c 10^-2

Question 40

milli

Answer 40

m 10^-3

Question 41

micro

Answer 41

u 10^-6

Question 42

nano

Answer 42

n 10^-9

Question 43

pico

Answer 43

p 10^12

Question 44

femto

Answer 44

f 10^-15

Question 45

energy

Answer 45

the capacity to do work (joules), calories

Question 46

atomic number is equal to

Answer 46

of protons and # of electrons

Question 47

Dalton

Answer 47

theory that atoms were indestructable

Question 48

of neutrons

Answer 48

atomic mass- # of protons

Question 49

nucleus mass vs size

Answer 49

only small part of atom but most of mass

Question 50

amu

Answer 50

1.67 * 10^-24g and the unit is u for mass number (ie. 14 u)

Question 51

elements without isotopes and mass vs. atomic

Answer 51

mass is double the atomic number

Question 52

elements with one or more atoms with different numbers of neutrons

Answer 52

isotopes

Question 53

density of solids and liquids expressed in

Answer 53

grams per cubic centimeter g/cm^3

Question 54

density of gases expressed in

Answer 54

g/L

Question 55

Mass equation

Answer 55

volume x density

Question 56

calorie in Joules

Answer 56

4.184J

Question 57

Kcal=Cal but what is cal

Answer 57

10^3 cal = 1Cal

Question 58

C to K

Answer 58

add 273.15 to C

Question 59

hydrogen isotopes

Answer 59

h-1=protium h-2=deuterium h-3=tritium

Question 60

percent abundance

Answer 60

number of atoms of an individual isotope ------------------------------------------------------- x100 total # of atoms of all isotopes of that element

Question 61

stoichiometry

Answer 61

branch of chemistry that deals with mole proportions of chemical reactions