Chemistry Homework for week of 9/12:
• Element quiz column II – Tuesday 9/13
• Flash cards for column III – due Thursday 9/15
• Introductory Lab - due on Block day 9/15
Make up missing sections at 7:15-8 in morning or
during 1, 5,6,7
• Lab quiz – Block day 9/15
• Review Sig fig extra practice – due Friday 9/16
• Complete Scientific notation part I – due Friday
9/16
• Element quiz column III – next Tuesday 9/20
• Atomic model project – due Tuesday 9/27
Monday 9/12
Objectives:
In class:
• Finish lab and hand it in
• Make or study element flash cards
• If you are finished with the lab please work quietly at your
seat – do not loiter in the lab area.
Upcoming assignments:
• Element quiz column II – Tuesday 9/13
• Flash cards for column III – due Thursday 9/15
• Introductory Lab - due on Block day 9/15 (Make up
missing sections at 7:15-8 in morning or during 1, 5,6,7)
• Lab quiz – block day 9/15
• Element quiz column III – next Tuesday 9/20
• Atomic model project – due Tuesday 9/27
Tuesday 9/13
Objectives:
• You will express measured values using scientific notation.
• You will determine appropriate number of significant digits
In class:
• Element II quiz
• Begin Section 5.1 -5.5 notes
Homework:
• Flash cards for column III – due Thursday 9/15
• Introductory Lab - due on Block day 9/15 (Make up missing
sections at 7:15-8 in morning or during 1, 5,6,7)
• Lab quiz – block day 9/15
• Review Sig fig extra practice – due Friday 9/16
• Complete Scientific notation part I – due Friday 9/16
Upcoming assignments:
• Element quiz column III – next Tuesday 9/20
• Atomic model project – due Tuesday 9/27
Sometimes numbers are large,
Sometimes they are very small.
To help us express them all,
We have Scientific Notation
Scientific Notation is based off the powers of 10, very similar to
the metric prefixes.
Example…567,000 in Sci-Not. is 5.67 x 105
5.67 x
constant
5
10
base
exponent
For numbers greater than or equal to 10
The power will be positive.
To determine the power’s value you count how many
decimal places you move the decimal to the left.
You move the decimal as many spaces as needed to leave
only one number to the left of the decimal point.
7
30000000.00 =
= 3.0
3.0· 10· 10
7654 3 2 1
7
For numbers lower than 1.0
The power will be negative.
To determine the power’s value you count how many
decimal places you move the decimal to the right.
You move the decimal as many spaces as needed to leave
only one number to the left of the decimal point.
-8 -8
0.0000000321 = 3.21
3.21· ·1010
12 345678
Calculator Extension
Switching between Normal and Scientific Notation can
be done on your calculator.
Press your “MODE” button and notice the following
FLO = normal
SCI = scientific notation
Try these examples: 0.000007
and
305000
Q: What does E mean?
Click Here
Answers
A: It’s the symbol representation of “10 to the power”
Thursday 9/15
Due today: column 3 note cards – please leave on your desk
If you have not already done so, hand in lab.
Objectives:
• You will express measured values in the appropriate
number of significant digits and uncertainty notation.
In class:
• Lab quiz
• Continue with notes – section 5.5
Homework:
No new homework
• Upcoming assignments:
• Element quiz column III – next Tuesday 9/20
• Atomic model project – due Tuesday 9/27
Friday 9/16
Objectives:
• You will express measured values using scientific notation.
• You will express measured values in the appropriate
number of significant digits and uncertainty notation.
• You will calculate the percent error of an experimental
value.
In class: Review Section 5.1 and 5.5 – quiz next Tuesday
Homework:
No new homework enjoy the weekend
Upcoming assignments:
• Element column III and scientific notation/ sig fig quiz –
next Tuesday 9/20
• Atomic model project – due Tuesday 9/27