Activator What elements make up Fe2O3 (rust), and how many atoms of each element are there? What elements make up NaCl (salt), and how many atoms of each element are there? What elements make up C2H7NO3S (Taurine), and how many atoms of each element are there?

Molecules September 8, 2017

Objective Students will be able to create models of molecules to represent their structure and chemical make-up.

What is a molecule? A molecule is a group of atoms bonded together. Molecules represent the smallest unit of a compound. Examples would be a single molecule (or single unit) of water, sugar, or salt.

Molecules When we are talking about molecules, we can put a number in front of a chemical formula to show how many molecules there are. We call this number a coefficient. Example: 6 H2O means 6 molecules of water Since each molecule has 2 hydrogen atoms and 1 oxygen atom, then 6 H2O means that we have a total of 12 hydrogen atoms, and 6 oxygen atoms.

Molecules Video

Now is the time for questions… Any questions about: The Periodic Table? (you’ll need to use it for today’s activity) Atoms? Elements? Compounds? Molecules? Chemical Formulas?

Making Molecules Activity You will be working with a partner! Follow along as we go through the packet together to make sure you understand directions. A large part of the grade for this activity will be how well you follow the directions and complete the activity in order.

Homework Have a good weekend!

Exit Ticket Have I signed off on all of your molecules?

Activator Name the chemical formulas for the following: Water Carbon Dioxide Salt Sugar

Molecules – Day 2 September 10, 2017

Objective Students will be able to create models of molecules to represent their structure and chemical make-up.

Review A molecule is a group of atoms bonded together. Molecules represent the smallest unit of a compound. A chemical formula tells you what is in a compound (the ingredients). The small numbers in the formula tell you how many atoms there are of each element.

Review

Making Molecules Use the remaining time to complete your molecules using the pipe cleaners and beads. When you are finished, go back to your seat and answer the questions on the last page. If you find the questions difficult, use your notes and try your hardest! Persevere through the challenges and give good, scientific explanations!

Discussion of Answers – Complete Sentences! 1. Which molecules are pure elements? 2. Which molecules are compounds? 3. Which is larger, an atom or a molecule? Explain your answer. 4. How are oxygen and ozone alike? 5. How are oxygen and ozone different? 6. Salt (NaCl) is made of sodium, a very reactive, gray metal, and chlorine, a toxic, greenish-yellow gas. What can you conclude about what happens to atoms when they form molecules?

Homework Take your Making Molecules Activity home if you have not finished answering the questions on the back. Bring it tomorrow, completed!

Exit Ticket Create a news bulletin (newspaper headline) to share with the class, describing what you learned today.