Finals week reminders!

1) Your final schedule is as follows:
                Wednesday: Period 1 & 6
                Thursday: Period 2 & 4
                Friday: Period 3
2) Remember to fill out your index card (cheat sheet) for the final
3) Study guide is posted on the website if you lost yours
4) Composition books are due on Monday, make sure all labs are completed

Calculating Moles & Atoms in an Element

Make sure to complete all your lab questions as composition books will be collected on Monday!

Calculating Moles and Atoms in an Element

Purpose: To determine the amount of moles and atoms in a sample of an element. 

Directions: With your partner pick three elements to measure.  On a scale measure the mass of the sample in grams.  Then calculate the number of moles and atoms by using your formula that you have been practicing.

1. Data:

(DO THIS THREE TIMES ONCE FOR EACH ELEMENT)

Name of sample: _____________

Mass: _____________

Number of moles: ____________

Number of atoms: ____________

Questions:

2. Which sample had the most amount of moles? Did this sample also have the most amount of mass of the three samples?

3. Which sample had the most amount of atoms? Did this sample also have the most amount of mass of the three samples?

4. Explain the relationship between the moles in an element and the amount of atoms in the element.

Missed HW post for Chapter 6!

Missed post for HW for Chpt 6!

1) pg. 187 ex 6.5, pg. 188 ex 6.6, pg. 191 ex 6.8, pg. 195 #1-6

Ms. Cotta's fake blog

I have create a fake blog for a fake product.  I have only included one ingredient, but the format would be the same for the other two ingredients for my product.

If you have questions about the blog, post them below and I will answer them.

Ms Cotta's blog Dynamite Gum

Study Guide for Final

Final Exam Study Guide

Chapter 1:

 Understand the difference between a theory and a law

Understand the difference between a qualitative observation and a quantitative observation.

Chapter 2:

Be able to explain the difference between elements, compounds and atoms.

Know what a molecule is.

Understand physical and chemical properties and be able to identify both types.

Be able to identify a physical versus a chemical change based on observations.

Chapter 3:

Be able to identify elements on the periodic table and explain what the atomic number, chemical symbol, atomic mass represent.

Understand what is an isotope and how isotopes differ.

 Know the regions of the periodic table and where to find different types of elements.

  Be able to explain what is a diatomic molecule.

Know what are cation and anion. Be able to identify what ions elements form based on their location on the periodic table.

  Be able to write formulas for ionic compounds by using their charges.

 Explain the number of protons, electrons and neutrons and atom has based on information from periodic table.

 Be able to identify group names of the periodic table (noble, alkalis, etc) and why their valence electrons determine their position.

  Explain what is a valence electron and its importance.

 

Chapter 4:

Know how to write names and formulas for Type I, Type II and Type III compounds.

Know how to identify polyatomic ions and use this knowledge to write names and formulas when these ions form compounds.

Chapter 5:

 Know how to write scientific notation for both large and small numbers.

  Know how to write scientific notation for both large and small numbers.

  Know how to calculate the density of an object using the formula D= M/V.

 

Chapter 6:

Be able to calculate the number of objects giving the total mass and the individual mass of an object.

Calculate the number of atoms, moles, amu, molar mass, and number of atoms using a set of steps starting from what you know to what you want to find out.

Understand what is a mole and what it represents.

 Calculate the percent composition of an element in a compound.

Chapter 7:

 Be able to balance equations using counting technique to balance both the reactants and the products in the reaction.

Be able to create a chemical equation by writing chemical formulas for compounds using ion charges for elements and polyatomic ions.

Identify the evidence for chemical reactions.

Chapter 11:

Understand the electromagnetic spectrum and its parts (which has more energy and less energy based on wavelength).

 Know what happens when an atom becomes excited by a photon.

 Know what an electron orbital is and what defines it.

  Be able to identify which elements have more ionization energy.

  Be able to identify elements by their electron configuration (1s, 2s).

 

Chapter 12:

Be able to explain the difference between an ionic and covalent bond.

 Be able to identify what elements are most electronegative.

 Be able to draw Lewis structures and identify what shape it will have.

Be able to write formulas for ionic compounds.

Homework for 12/8

Homework for Monday 12/8:
1) pg. 212 #29, 51, 52
2) Remember that tutoring for last test will be on Monday (only chance for extra credit)
3) Tutoring for final on Wednesday & Friday

Homework for 12/4

1) pg. 211 #21 (c & d), #22 (b & d), 23, 25, 28
2) Blog due Mon. Dec. 8th
3) Comments due Fri. Dec. 12th
4) Tutoring schedule: Tutoring (last test review) Monday, Final review W & F (next week)

Homework for 12/2

1) pg. 211 #17-20
2) Blog due Mon. Dec. 8th
3) Comments due Fri. Dec. 12th
4) Tutoring schedule: Tutoring (last test review) F & next Monday, Final review W & F (next week)

Post your link here for your blog

In the comments section below, post the link for your blog. Make sure to include:

1) the link for the blog
2) your full name
3) your period
4) what product you researched

Penny Counting Activity Lab

Penny Counting Activity

Objective: Determine how many pennies are in a container without opening it by using a step by step process.

Directions: You have a container with a small amount of pennies inside it. You need to determine, without opening the container, how many pennies are contained inside it.  You have balances, calculators, example pennies and containers in the room. 

Questions:

1. Write and explain your calculations to determine the amount of pennies in the container. Write your step by step process and be specific.

2. Did you figure out the correct number of pennies? What did you do right or wrong?

3. How does this procedure relate to the concept of the weights of atoms and the mole?  Explain what this would allow us to compute about the number of moles.

4. How would this be different if the coins were nickels or quarters? How would this relate to the atoms and moles? Think about what we looked at with different substances and the number of moles.