11/17 A/B DayLEQ: How can neutrons and electrons affect the characteristics of an atom?

1. What is the difference between a convergent and divergent boundary?2. What is the name of the process that causes tectonic plates to move and shift?3. What is the law of superposition?4. What is a proton?5. What is an atom?

Track your progress: Unit 2 Quiz A-1 = 96 -9 = 64 -17 = 32-2 = 92 -10 = 60 -18 = 28-3 = 88 -11 = 56 -19 = 24-4 = 84 -12 = 52 -20 = 20-5 = 80 -13 = 48 -21 = 16-6 = 76 -14 = 44 -22 = 12-7 = 72 -15 = 40 -23 = 8-8 = 68 -16 = 36 -24 = 4

7

NNitrogen

14.01

Element Symbol

Atomic Number(# of protons

in the nucleus)

Element NameAtomic Mass

(total # of

particles

in the nucleus)

LET’S REVIEW…

How do we find the number of neutrons?

Today’s LEQ: How can neutrons and electrons affect the characteristics of an atom?

By the end of today, you should be able to…

1. Model isotopes when given a specific atomic mass

2. Model ions when given specific charge

3. Tell the charge of a diagram of an atom

Make a hypothesis: Closest answer gets an emergency pass!

When we change the number of protons in an atom, it becomes a different element.

When we change the number of neutrons in an atom, I think_________________________.

When we change the number of electrons in an atom, I think_________________________________.

Focus Vocabulary:

66. Isotope67. Ion

ISOTOPE

ISOTOPE

Atom with a different number of neutrons

BrainPop: Isotopes

Copy this in your notes…

C-12ELEMENT SYMBOL

ATOMIC MASS

Elements of the same TYPE can

have DIFFERENT ATOMIC MASSES

Carbon: What is the atomic mass?

12

Carbon: What is the atomic mass?

14

Normal Carbon Carbon ISOTOPE

They have a different number of neutrons!

6 protons6 neutrons(Atomic Mass = 12)

6 protons8 neutrons(Atomic Mass = 14)

C-12 C-14 (isotope)Protons:Neutrons:

Protons:Neutrons:

66 (12-6=6)

68 (14-6=8)

ISOTOPE

Atom with a different number of neutrons

C-12 = normal carbon atom (6 neutrons)

C-14 = carbon ISOTOPE (8 neutrons)

Let’s model some isotopes!Neutrons Protons

We are ONLY MODELING THE NUCLEUS NOW!!!

He-42

HeHelium

4.00260

Nucleus

He-5 (isotope!)

2

HeHelium

4.00260

Nucleus

Be-9

Nucleus

4

BeBeryllium

9.01218

Be-10 (isotope!)

Nucleus

4

BeBeryllium

9.01218

Be-11 (isotope!)

Nucleus

4

BeBeryllium

9.01218

O-16

Nucleus

8

OOxygen

15.9994

Model: 0-14 Isotope

Model: Ne-22 Isotope

Model: Ne-23

Model: Na-22 Isotope

Draw and label in your notebook….(nucleus only, but LEAVE ROOM FOR ELECTRON ENERGY LEVELS! WE WILL ADD THESE LATER!)1. Li-72. Li-5 (isotope)3. N-144. N-15 (isotope)5. F- 16 (isotope)6. Ne-207. Ne-21 (isotope)8. H-2 (isotope)

REMEMBER:

HOT Q: How is an isotope different from just a regular atom? What about the atom CHANGES?

Hint:

THE MASS!!!(or weight!)

Regular Atom Isotope with

more neutrons

Regular Atom

Isotope with less neutrons

Isotopes and Absolute Dating: Reading1.What is one way that scientists use isotopes?

2.What substance is found in all living things?

3.Do you think that carbon dating is a good way to predict the age of something? (Is there anything you think might make this process inaccurate?)

4.How do isotopes relate to our last unit of geologic evolution and earth history?

Summarizer: PART ONE

Take a look at your hypothesis from the beginning of class. It should look like this,

When we change the number of neutrons in an atom, I think _______.

1. Was your hypothesis correct? (Totally? Partially? Not at all?)

2. What ACTUALLY happens when we add or subtract the number of neutrons in an atom? How do the characteristics of the atom change? (YOU MUST USE THE WORD ISOTOPE IN YOUR ANSWER!)

Today’s LEQ: How can neutrons and electrons affect the characteristics of an atom?

By the end of today, you should be able to…

1. Model isotopes when given a specific atomic mass

2. Model ions when given specific charge

3. Tell the charge of a diagram of an atom

ION

ION

Atom with a different number of electrons; has a + or — CHARGE

BrainPop-Ions

ION

Atom with a different number of electrons

N +1 = nitrogen that LOST one valence electron N -2 = nitrogen that GAINED two valence electrons