Lesson 2 Building Blocks of Matter Part 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 !!!

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?

Lesson 2 - Building Blocks of Matter Active Reading Page 157 Part 1 - The Atom Complete #3 Vocabulary Termsatom neutron electron cloud nucleus atomic number proton mass number

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?

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.

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?

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.

Lesson 2 - Building Blocks of Matter What are the parts of an atom? Part 1 - The 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 1 u. U=the unified atomic mass unit.

Lesson 2 - Building Blocks of Matter What are the parts of an atom? Part 1 - The 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.

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.

Electron Cloud e- N o Nucleus + P

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 Slightly less massive than a neutron Proton Nucleus 1 -

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

Lesson 2 - Building Blocks of Matter How can we describe atoms? Part 1 - The Atom 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.

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.

Lesson 2 - Building Blocks of Matter UNITED DISCOVERYUnited Discovery- The Atom Part 1 - The Atom

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.

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

Lesson 2 - Building Blocks of Matter Part 1 - The Atom With a partner, complete pages 166 -167 in your lesson packet. DO NOT DO #6

Lesson 2 - Building Blocks of Matter Visual Summary Answers- page 166 15) False 16) False 17) False 18) True Lesson Review- page 167 1) C 2) A 3) B Part 1 - The Atom

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.

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.

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