counting atoms1
TRANSCRIPT
You Will Need:1. Bohr Model Drawings &
Density Review – Due Now 2. Atoms-Building Blocks of
Matter – Counting Atoms Bookshelf – Please Staple
You Will Need:1. One Pencil2. Materials Manager – Pick up One
Periodic Table3. Oral Presenters – What is your
team’s Table Number & Wager?4. Managers – Fill in Chart5. Timer Designers – Return Final
Jeopardy and P.T. after 2 minutes
The formula for a compound indicates the elements that make up the compound and the number of atoms of each element present in that specific compound. These numbers of atoms are indicated by the use of small numbers called subscripts.
When a subscript appears outside the parentheses, it indicates that all the elements inside the parentheses should be multiplied by that subscript.
Fe(OH)3
• Calcium Carbonate = Limestone
CaCO3
Ca = Calcium = 1
C = Carbon = 1
O = Oxygen = 3
• Magnesium Hydroxide
Mg(OH)2
Mg = Magnesium= 1
O = Oxygen= 2
H = Hydrogen= 2
Trinitrotoluene = (TNT) explosive
C7H5(NO2)3
C= Carbon = 7H = Hydrogen = 5N = Nitrogen = 3O = Oxygen = 6
As you look over these compounds you may observe that many of them contain similar _________ of elements. Since we are a ______________ based environment, carbon is found in all living organisms. The elements in the Human Body can be broken down to include the main elements of Hydrogen, Oxygen, Nitrogen, Carbon and representatives from about 20 other elements.
atomscarbon
The _________ main elements that make up most living organisms are Carbon, ________________, Sulfur, __________________, Oxygen and _____________.
Phosphorus
SIX
HydrogenNitrogen
•Mass Unit Label =_______________
•Volume Unit Labels = ________, _______ or _______as a unit label
•Density unit label = ___________, ________ or __________
grams
mLcm3
cc
g/cm3
g/mL g/cc
5 points given:• 2 points for the problem you
are inputting into the calculator
• 2 points for the answer rounded to the nearest hundreth
• 1 point for the unit label
1. Counting Atoms – Due Tuesday-April 2nd
2. Enjoy your SPRING BREAK!