What Are We Doing Today?

• QOD• Continuing with the Mole & some notes• Video on Mole• Practice Problems• Get back assignment• Away Thur/Fri, but you are still responsible

The Mole

Q: how long would it take to spend a mole of $1 coins if they were being spent at a rate of 1 billion per second?

MollionaireQ: how long would it take to spend a mole of

$1 coins if they were being spent at a rate of 1 billion per second?

A: $ 6.02 x 1023 / $1 000 000 000 = 6.02 x 1014 payments = 6.02 x 1014 seconds

6.02 x 1014 seconds / 60 = 1.003 x 1013 minutes1.003 x 1013 minutes / 60 = 1.672 x 1011 hours1.672 x 1011 hours / 24 = 6.968 x 109 days6.968 x 109 days / 365.25 = 1.908 x 107 years

A: It would take 19 million years

Quiz

• Make sure to sit away from anyone else• You need a pencil or pen• Close your books & notes• Make sure you put your name on the quiz• When you are finished, put your hand up and I

will come and collect your quiz.

Recycling Jobs

How did they go? Any problems?

APES (explained)

Atomic Models…(What is the difference)

a) Ball & Stick b)Lewis Structure c) Rutherford-Bohrd)Simplified

Ball & Stick Model

Draw the ball & stick model for Carbon

Lewis Structure Draw the Lewis model for Carbon

Rutherford-Bohr Model Draw the Ruth-Bohr model for

Carbon

Simplified Model p.28 Draw the Simplified model for

Carbon

ISOTOPES. What are they?

They are different versions of an atom.Isotopes are atoms which have the same atomic

number but different mass numbers. They have the same number of protons but different numbers of neutrons.

• The number of neutrons in an atom can vary within small limits. For example, there are three kinds of carbon atom 12C, 13C and 14C. They all have the same number of protons, but the number of neutrons varies.

PROTONS NEUTRONS MASS NUMBER

CARBON-12 6 6 12

CARBON-13 6 7 13

CARBON-14 6 8 14

Lemon Car ExampleLemona GTX-CD player-Brown CarLemona GT-MP3 Player-Blue CarLemona S-Red Car-Sunroof

ISOTOPES. What can we use them for?

Video:https://www.youtube.com/watch?v=54e5Bz7m3do

Metals & Non Metals Lab

- Lab tomorrow (Thursday)- What to do before the lab (questions, prep)- What to do in the lab (safety, partner)- What to do after the lab is over (clean up,

finish questions, hand in)- Lab (prelab + prelab quiz)

Pop Quiz Review

• Close your books• No helping• I will ask random people

Good luck

What to do now?

• Work on prelab for tomorrow