chem exam

Question 1

Metallic bond

Answer 1

M, M

Question 2

Covalent bond

Answer 2

NM, NM

Question 3

Ionic bond

Answer 3

NM, M

Question 4

when naming formulas that are ionic

Answer 4

you don’t add prefixes

Question 5

when naming formulas that are covalent

Answer 5

you add prefixes

Question 6

significant figures steps
Ex. 34.50g and 3450g

Answer 6

1. identify Pacific Atlantic
   Pacific - decimal Points, read from the left
   Atlantic- no points, read from the right
2. Count #’s from either left or right
   0’s after # are counted, 0’s before # are not.
   Ex. 34.50g, 4 sig fig. 3450g 3 sig fig

Question 7

Atom map: protons
center, first ring (VERY close to center NOT option A), second outer ring, floppy bags

Answer 7

center

Question 8

Atom map: nuetrons
center, first ring (VERY close to center NOT option A), second outer ring, floppy bags

Answer 8

center

Question 9

Atom map: valence electrons
center, first ring (VERY close to center NOT option A), second outer ring, floppy bags

Answer 9

very outer ring

Question 10

Atom map: first s orbital
center, first ring (VERY close to center NOT option A), second outer ring, floppy bags

Answer 10

very closest ring

Question 11

Atom map: p orbital
center, first ring (VERY close to center NOT option A), second outer ring, floppy bags

Answer 11

floppy bags

Question 12

top left on periodic table

Answer 12

proton + nuetron

Question 13

bottom on periodic table

Answer 13

nuetron

Question 14

top left - bottom =

Answer 14

electron

Question 15

atomic mass
ex. ^65 29Cu natural abundance 30.83% and ^63 29Cu natural abundance 69.17%

Answer 15

multiple top left x natural abundance (but move decimal 2x to the left for NA) + top left2 x NA 2
(65 x .3083) + (63 x .6917)

Question 16

lewis dot diagram!!

Answer 16

follow the columns for the amount of dots, max 10 per orbital tho. max any at all is 18
ex. 5–> column 5 or column 15

Question 17

BOHR model steps
Ex. ^16 32.06 S

Answer 17

1. ^16- protons, 32.06- protons and neutrons, b/c charge is neutral means protons and nuetrons are equal
2. put P^+ = 16 nd N* = 16, circle with an orbital and put 2 dots on it, 2nd orbital 8 dots, third 6 dots. (max 8 dots per orbital)

Question 18

orbital box (arrows)

Answer 18

1s__ 2s__ 2p__
just calculate how many electrons and see how many left
^16- 32.06

Question 19

electron configuration (1s^2)
Neon 10

Answer 19

1s^2 1s^2 2p^6
just calculate how many electrons and see how many left
20-10

Question 20

Democritus

Answer 20

first to conceptualize the existence of atoms (was like everything is made of atoms!)

Question 21

JJ Thompson

Answer 21

developed plum pudding model

Question 22

Rutherford

Answer 22

disproved ppm with golden foil experiment

Question 23

Bohr

Answer 23

invented the Bohr diagram

Question 24

Schrodinger

Answer 24

published quantum mechanical model, quantum particles + waves

Question 25

nuclear equation ex. ^232 90 Th--> ^228 88 Ra + ^A B C

Answer 25

^232- ^228 = A 90-88= B ^A B X, X=C A=4 B=2 C=H

Question 26

types of decay: Alpha decay

Answer 26

nuclear equation is 4/2

Question 27

types of decay: Beta decay

Answer 27

nuclear equation has -1

Question 28

types of decay: Gamma decay

Answer 28

nuclear equation has 0

Question 29

periodic table

Answer 29

increasing EN and ionization upward left increasing EN and ionization going right top increasing atomic radius right ownward

Question 30

define electronegativity

Answer 30

the attraction of an atom w/in a bond

Question 31

define atomic radii

Answer 31

the distance between the nucleus and valance electrons

Question 32

define ionization energy

Answer 32

the energy necessary to remove one electron

Question 33

sort from most to least electronegative

Answer 33

in order of distance from upper right corner of pd

Question 34

covalent electrons

Answer 34

shares valence electrons

Question 35

ionic electrons

Answer 35

NM take valence electrons from the M

Question 36

metallic electrons

Answer 36

an electron sea

Question 37

metallic conductors

Answer 37

great conductors

Question 38

ionic conductors

Answer 38

alr conductors

Question 39

covalent conductors

Answer 39

bad conductors good insulator

Question 40

what's bond angle H2O

Answer 40

104.5

Question 41

number naming

Answer 41

mon di tri tetra

Question 42

Naming ray

Answer 42

D and B

Question 43

types of reactions

Answer 43

combustion, double replacement, single replacement, synthesis