1. Lesson 2- Building Blocks of Matter Part 1- The Atom
Activating Strategy- Engage Your Brain page 157
You Tube- Bill Nye : Atoms
Complete the video worksheet as you watch the video.
Do the best that you can, don’t worry if you can’t get all the answers !!!

2. Lesson 2- Building Blocks of Matter Part 1- The Atom
Write the Essential Question on your note page at the end of the lesson.
EQ: How does one determine what matter is made of?

3. Lesson 2- Building Blocks of Matter Part 1- The Atom
Active Reading Page Complete #3
Vocabulary Terms-
atom neutron
electron electron cloud
nucleus atomic number
proton mass number

4. Lesson 2- Building Blocks of Matter Part 1- The Atom
What makes up matter?
Democritus’s term “atom” is from the Greek word atomos meaning “not able to be divided.
Aristotle, another Greek philospher, disagreed with Democritus.
Think About- with your table partners, discuss why Democritus nor Aristotle did experiments to test their ideas?

5. Lesson 2- Building Blocks of Matter Part 1- The Atom
ATOMS- Page 159
The atom is the smallest particle into which an element can be divided and still be the same element.
The atom is still considered to be the basic unit of matter because it is the smallest unit that has the chemical properties of an element.
You cannot see individual atoms.
There are many types of atoms that combine in different ways to make all substances.

6. Lesson 2- Building Blocks of Matter Part 1- The Atom
Page 159 #6- With your table partners.
What can you infer about atoms from this image?
What can’t you infer from this image?

7. Lesson 2- Building Blocks of Matter Part 1- The Atom
Page 159 #6- With your table partners.
What can you infer about atoms from this image?
Answer: I can infer that many atoms connect together to make up substances.
What can you infer from the image?
Answer: I cannot infer what the smaller particles that make up atoms look like.

8. Lesson 2- Building Blocks of Matter Part 1- The Atom
What are the parts of an atom? Page 162
Protons and neutrons are found in the center of the electron cloud.
Protons- positively charged particles of atoms.
The charge of a single proton is written 1+
The mass of a proton is about 1u. U=the unified atomic mass unit.

9. Lesson 2- Building Blocks of Matter Part 1- The Atom
What are the parts of an atom? Page 162
Neutrons- particles that have no electric charge.
They are a little more massive than the protons.
Atoms usually have as many neutrons as protons.
Together, protons and neutrons make up the nucleus of the atom. The nucleus is located at the center of an atom.

10. Lesson 2- Building Blocks of Matter Part 1- The Atom
The Electron Cloud page 163
The negatively charged particles of the atom are called electrons.
Electrons move around the nucleus very quickly it is not possible to determine their exact location and speed at the same time.
Compared with neutrons and protons, electrons have very little mass.
The charge of a single electron is represented as 1-.
The charges of protons and electrons are opposite but equal.

11. Electron Cloud
Nucleus N o e - P +

12. Lesson 2- Building Blocks of Matter Part 1- The Atom
Summarize- With your table partners, complete the graphic organizer on page 163.
Part of atom
Location in the atom
Electric Charge
Relative Mass
Proton
Slightly less massive than a neutron
Nucleus 1-

13. Lesson 2- Building Blocks of Matter Part 1- The Atom
Check your results
Part of atom
Location in the atom
Electric Charge
Relative Mass
Proton
Nucleus 1+
Slightly less massive than a neutron
Neutron
Slightly more massive than a proton
Electron
Electron Cloud 1-
Almost 0

15. Lesson 2- Building Blocks of Matter Part 1- The Atom
How can we describe atoms? Page 164
Different combinations of protons, neutrons, and electrons produce atoms with different properties. The number of each kind of particle within an atom determines its unique properties. In turn, these different atoms combine to form the different substances all around us.
BY ATOMIC NUMBER
The number of protons distinguishes the atoms of one element from the atoms of another.
The number of protons in the nucleus of an atom is the atomic number.

16. Lesson 2- Building Blocks of Matter Part 1- The Atom
#12 on page 164
With your table partners, answer question #12.
Answer: All atoms of the same element have the same number of protons.

17. Lesson 2- Building Blocks of Matter Part 1- The Atom
UNITED DISCOVERY-
United Discovery- The Atom

18. Lesson 2- Building Blocks of Matter Part 1- The Atom
BY MASS NUMBER – page 165
The atoms of a certain element always have the same number of protons, but they may not always have the same number of neutrons.
Isotopes are atoms of the same element that have different numbers of neutrons.
The total number of protons and neutrons in an atom’s nucleus is its mass number.

19. Lesson 2- Building Blocks of Matter Part 1- The Atom
Diagraming Atoms
With a partner, you will be diagraming an atom of an element.
Part 1- Use the given information to label the correct protons, neutrons, and electrons of an atom of Neon.
Part 2- Answer questions 2,3, and 4

20. Lesson 2- Building Blocks of Matter Part 1- The Atom
With a partner, complete pages in your lesson packet.
DO NOT DO #6

21. Lesson 2- Building Blocks of Matter Part 1- The Atom
Visual Summary Answers- page 166
15) False
16) False
17) False
18) True
Lesson Review- page 167 C A B

22. Lesson 2- Building Blocks of Matter Part 1- The Atom
Lesson Review Continued
4) Protons (+) , Neutrons (no charge), Electrons (-)
5) Chemical bonds join different types of atoms and different numbers of atoms together in different combinations to form many substances.
7) The atomic number of a sodium atom that has 11 protons and 12 neutrons is 11.
8) The atomic number is equal to the number of protons.

23. Lesson 2- Building Blocks of Matter Part 1- The Atom
9) Mass = number of protons + number of neutrons
Mass =3
10) The nucleus is in the center of the atom where the dark circle is located. The electrons are in the electron cloud.
11) An atom is the smallest particle of an element that still has the properties of the element. Matter is made up of a combination of atoms.

24. Lesson 2- Building Blocks of Matter Part 1- The Atom

25. Lesson 2- Building Blocks of Matter Part 1- The Atom

26. Lesson 2- Building Blocks of Matter Part 1- The Atom