Molar mass and Amu

1
Molar mass and Amu
2
Algebra Hell

• Each and every individual that missed the second
  question on the exam must be here on Thursday
  morning for a review of algebra.

3
Separation Lab redo on Thursday 700
4
1) Molecules are independent units of distinct
contents2) Ionic are accumulations of charged
particles
5
Molecules
6
ionic compounds
7
a block of salt is held together by ionic bonds
What happens if the ionic compound is placed in
the presence of a strong electric charge
8
Electrolysis of salt
9
Hydration of salt in water
10
Hydration of Sugar
11
Inter Molecular bonds are tighter
Our skin is made of covalent bonds
Ionic bonds are weaker
If we were made of ionic compounds we would
dissolve in water
12
work on Handout 10 and go over answers when
finished
13
So lets talk about how these elements, molecules,
and ionic compounds
named

• You need to memorize 30

14
NaOH Sodium Hydroxide

• Baking soda Sodium Bicarbonate
• Sodium Hydrogen Carbonate
• NaHCO3
• Powdered Chalk
• Calcium Carbonate CH3COOH

Maddness!!!!!!!!!!!!
15
To start we need to learn a few of the 103
elements

• There are tricks to this
• 1) many are named after the location where you
  find them
• 2) or what they look like

16
Potassium KPhosphorus PCalcium CaIron FeSod
ium NaCopper Cu
Dirty dozen
Gold AuLead PbMercury HgTin
SnSilver AgLithium Li
17
Hydrogen is H

• Helium is He

Gold is one of the most lustrous (shiny) metals
Au
Iron which comes from the Latin word ferrum,
meaning iron. Fe
Silver as Ag for argentum or Argentina where they
would mine silver
18
Lead symbol, Pb, comes from the Latin word for
lead, plumbum. We get the word plumber.

• Tungsten, also called wolfram from the ore
  wolframite and has the symbol W.

Tin is Sn and it is cheap and often allergic and
put in cheap jewelry and that is a sin
19
international symbol
20
Mass in Grams per mole Mass in AMU
Atomic Mass
21
Atomic number
22
(No Transcript)
23
The periodic table is broken into area that have
particular characteristics
Metals Nonmetals Nobel gases Metalloids
Semiconductors
24
(No Transcript)
25
Metals located in the lower left region
Nonmetals are located in the upper right region
Metalloids are on the line
26
Describe metals
Conduct electricity, carry heat, malleable,
reflect light
All due to movement of electrons and their bonds
Describe nonmetals
Suck up loose electrons, suck up heat, ridged,
dont reflect light
27
metalloids

• Have characteristics of both metals and nonmetals
• Control current in a computer

28
Nobel gases
Xenon and krypton are used in high-powered
lights, such as those used in lighthouses.
Fluorescent tubes use a mixture of argon and
krypton, while neon is best known for its use in
display tubes and signs
29
So lets get back to these elements and how they
can become stable
If they lose an electron they become positive
If they gain and electron they become negative
30
Positive ions are called a Cation
Negative ions are called anions
31
Sodiums valance electrons are 1s2 2s2 2p6
3s1 so...
32
Name the elements whose electron
configurations are 1.1s2 2s2 2p6 3s2 3p4
2.1s2 2s2 2p6 3s2 3.1s 2s2 2p5 Write
electron configurations for these elements
1.Nitrogen 2. Magnesium 3. Neon
4. Oxygen
33
The Sodium Cation is written
34
Chlorine atom 3s2 3p5
35
ionization energy.
Does it always take the same amount of energy to
knock an electron off?
NO!!!!!!!!!!!
36
What is the best way to carry a ball?
37
ionization energy
Electrons need to be ripped off here
Electrons fall off here
38
Oxidation number

• Group Charge
• 1A 1
• 2A 2
• 7A -1
• 6A -2
• Exceptions

39
Handout the worksheet