exam review

Question 1

properties of Ionic compounds

Answer 1

• high melting point
  -hard and brittle
• conducts electricity
  -electrolytes
• high solubility

Question 2

properties of molecular compounds

Answer 2

• low melting point
  soft
• does not conduct electricity
  -no electrolytes
  low solubility

Question 3

Dalton

Answer 3

featureless sphere

Question 4

Rutherford

Answer 4

• protons in the nucleus
• electrons around nucleus
• NO Neutrons

Question 5

Bohr

Answer 5

electrons are in a shell around the nucleus
-energy level module

Question 6

Average atomic mass

Answer 6

AAM = M1(%) + M2(%)

Question 7

isotope abundance

Answer 7

let X be % abundance as a decimal of isotope #1
let X+1 “ “ “ “ “ “ isotope 2
*use same formula as average atomic radius

Question 8

heat capacity

Answer 8

q = mcT

Question 9

calorimetry

Answer 9

Mhs = -(mcT)
^ ^
system surrounding

Question 10

molecules/ non polar forces

Answer 10

LDF

Question 11

polar forces

Answer 11

LDF , DDF, and it if it contains Hydrogen HB

Question 12

bases

Answer 12

OH
- electrolytes
- blue litmus paper

Question 13

saturated

Answer 13

contains the maximum quantity of the solute in at a given temp or pressure

Question 14

Supersaturated

Answer 14

contains more than the maximum quantity of the solute at a given temp or pressure

Question 15

unsaturated

Answer 15

a more solute can be dissolved at the given temp and pressure

Question 16

PH acid

Answer 16

less than 7

Question 17

PH base

Answer 17

greater than 7

Question 18

PH formula

Answer 18

PH = -log [H(aq)]

Question 19

H + formula

Answer 19

H = 10 ^PH

Question 20

polar (electronegativity test)

Answer 20

< 0.5

Question 21

non polar (electronegativity test)

Answer 21

> 0.5

Question 22

Molecular

Answer 22

everything else
- no electrolytes
-

Question 23

Ionic

Answer 23

metal and non metal
electrolytes

Question 24

acid

Answer 24

contains and H
electrolytes
red litmus paper

Question 25

solid

Answer 25

defined shape and volume
dominate particles: VIBRATION

Question 26

gas

Answer 26

indefinite shape + volume
no forces
Dominate motion of particles: ROTATION

Question 27

liquid

Answer 27

indefinite shape + definite volume
Dominate motion of particles: TRANSLATION

Question 28

find an neutrons of and isotope

Answer 28

neutrons = mass - atomic #

Question 29

what causes an electron the jump

Answer 29

when an atom absorbs energy the electrons can jump from ground to higher energy levels ( excited state)

Question 30

ionic form

Answer 30

brackets

Question 31

covalent form

Answer 31

structural diagram

Question 32

shapes that cancel

Answer 32

tetrahedral, trigonal planar , linear

Question 33

STAP

Answer 33

pressure: 100kPa Volume : 24.8 temperature 25

Question 34

STP

Answer 34

pressure 101.325 volume : 22.4 temperature: 0