1. To get: Chrome Book - Open myMCPS classroom
Intro to Chemistry Notes
To Turn In: Observing Living Organisms Lab (if not turned in on Friday
Homework: Create (at least) 5 flashcards from the chemistry terms

2. Warm Ups 3 minutes to get a STAMP
Monday
Question: What is matter?
3 minutes to get a STAMP
Must write the question AND your answer
3 points each:
1pt - question
1pt - stamp
1pt - correct answer
15 points per week
Absent? Copy from a neighbor

3. CHEMISTRY!?!!

4. Chemical Terms- Pg 5 Matter- anything that occupies ____ and has _____
The “stuff” of the universe
All chemicals are matter just like all matter is basically chemical
Space
Mass

5. What makes up Matter? Atoms!
Atom- The smallest possible ____ of an element that still has the properties of that element.
Made of 3 particles:
unit
Location
Charge
Proton
Neutron
Electron
Nucleus +1
None
Nucleus
Electron Cloud -1

6. **The proton and neutron together form the (atomic) nucleus.
**The electrons move quickly outside of the nucleus in the electron cloud

7. Chemical Terms
Element- a pure substance made of the same types of atoms that cannot be broken down into other substances by chemical means.
Compound- a substance containing two or more elements that are chemically combined
A great example is WATER
Water is made of 2 Hydrogen atoms and 1 Oxygen atom (H2O)

8. Every element has a symbol containing 1 or 2 letters
Ex: Carbon = _________ Sodium= ________
Hydrogen= _________ Chlorine= _______
Oxygen = ________ Calcium= ________
Nitrogen= _________ Phosphorus= ________
Use the chart to fill in the symbols for each element.

9. Atomic Number: The # of in the nucleus—
different for each element.
protons

10. In a neutral uncharged atom, the # of protons = # of electrons
What is the charge on an atom with:
8 protons and 10 electrons? -2

11. What is the charge on an atom with
4 protons and 2 electrons? +2
Build an Atom practice on chromebooks- Google Classroom

12. Summarizer/Exit Card on myMCPS
Period 3- Take Exit Card immediately
Summarizer/Exit Card
on myMCPS
Open myMCPS Classroom
Go to Biology Class
Click on Quizzes
Complete:Intro to Chemistry Day 1 Exit Card
Do NOT eat the M&Ms on your desk. They are Dirty.
You will earn clean M&M’s to eat at the end of class

13. To pick up: Edible Atom Activity
Chromebook (just to go to weebly)…can use your phone
To get out: Blue Warm up Sheet
Notes from yesterday
Homework: 8 flashcards- Properties of water
From Weebly
(You can paraphrase definitions)
Do NOT eat the M&Ms on your desk. They are Dirty.
You will earn clean M&M’s to eat at the end of class

14. Tuesday Warm Up Question: 1) Proton charge? 2) Neutron charge?
3) Electron charge?
Get out Blue Warm Up sheet

15. Electrons are arranged in energy levels (also called Orbitals or Electron Shells)
Electrons in the outermost shell are called ____________ electrons. The number of Valence Electrons, determines how many ________ an element can form.
Atoms are most reactive when the outer shell is partially full (Atoms "want" to have a full outer shell!)
Valence
Bonds

16. Energy Level Number of Electrons
# of Electrons each energy level can hold:
Energy Level
Number of Electrons
1st
2nd
3rd 2 8 8

17. Drawing a Bohr Model Oxygen: Atomic #8
Find your element on the periodic table
Determine how many electrons your element has (hint: this is the same as the atomic number)
Fill in the energy levels from the inside out, keeping in mind how many electrons each energy level holds.
Total # electrons:
# Valence e-=
+ Vacanices= 8 6 2

18. Draw a Bohr model of Magnesium Atomic # 12
Total # of electrons:
# Valence e-=
+ Vacanices= 12 2 6

19. Chemical Bonding
Atoms interact such that they all try to have 8 electrons in outermost orbit (energy level)
The attractive forces between atoms in a compound are chemical bonds 11

20. Chemical Bonding Vocab:
Molecule: A particle with 2 or more atoms bonded together
Compound: Molecule with at least 2 different elements. They can have very different properties from the elements that make them up.

21. An example:  Chlorine is a greenish gas while sodium is a soft, shiny metal.  When the two are combined, white sodium chloride (table salt) is made
NaCl

22. Chemical Bonding
Covalent Bonds - Two atoms share one or more pairs of electrons
Each ends up with 8 electrons in its outermost energy level (at least part of the time) 11

23. Draw a Covalent Bond
Hydrogen
Hydrogen + H H

24. Chemical Bonding
Ionic Bonds - One atom loses electrons; the other gains electrons
Ions: any atom/molecule with
Charge (positive or negative) 11

25. Chemical Bonding Atom that loses electrons has a net positive charge
Atom that gains electrons has a net negative charge
Unlike charges attract
An ionic bond is then formed from the attraction between the positive charge and negative charge 11

26. Sodium Chloride (NaCl)
Draw an Ionic Bond:
Sodium Chloride (NaCl)
Sodium (atomic number 11)
Chlorine (atomic number 17)

27. Bohr Modeling with M&Ms
Group 1 and 5: Ne, N, O, Mg
Group 2 and 6: Be, F, S, Mg
Group 3 and 7: Li, N, Ar, P
Group 4 and 8: Cl, B, Na, O