ATOMS, IONS, AND

ISOTOPES….

OH MY !!!Grab your chromebook, log in

BE READY when the bell rings!

DO NOT START THE WARM-UP

UNTIL INSTRUCTED TO DO SO!

http://www.sciencegeek.net/Chemistry/taters/Unit1Numbers2.htm

Homework Check

Check your homework using the key on the

following slide.

Should you find an answer that you believe is

keyed wrong, don’t hesitate to ask….

I’m human and do make mistakes ☺

If you miss something and don’t

understand….ask for help !!

The Atom!

Proton +1

NUCLEUS

Electron - 1 OUTSIDE NUCLEUS

Neutron 0

NUCLEUS

RECALL

Objectives:By the end of today’s class you will be able to:

○ Write the Atomic Symbol Notation of a given atom

○ Define isotopes and ions.

○ Determine the charge of an ion given the number of protons and electrons.

Copy Into Your Notes:2 Atomic Symbol NotationS .

DID YOU NOTICE THE

DIFFERENCES????

C – 12Mass #

ATOMIC SYMBOL NOTATION

EXAMPLES: Write the 2 forms

An atom with 33 protons and 45 neutrons

An atom with 27 protons and 33 neutrons

ATOMIC SYMBOL NOTATION

EXAMPLES: Write the 2 forms

An atom with 33 protons and 45 neutrons

As – 78 7833As

An atom with 27 protons and 33 neutrons

Co - 60 6027Co

You Try○ Copy the following problems and write the following in

atomic symbol notation in your notebook:

(1) Lead with 125 neutrons

(2) An element with 25 protons and 30 neutrons

(3) An element with 19 proton and 20 neutrons

You Try○ Write the following in atomic symbol notation

207

82 Pb

55

25 Mn

39

19 K

What is an Isotope?

○Watch the following video and write a definition for an

isotope in your notes.

○Be sure to include what subatomic particles are the

same and different in isotopes of the same atom.

https://www.youtube.com/watch?v=xjY5p-1CDr8

Isotopes○ Isotopes are atoms of the same element with the same

number of protons but different numbers of neutrons.

○ Atoms can have more than one isotope.

○ Different isotopes can have slightly different properties.

○ Ex. Carbon-14 (radioactive) and Carbon-12 (not radioactive)

Need further explanation? Tennis Ball Isotopes Video

○ http://www.youtube.com/watch?v=oLnuXpf4hsA

You Try It….

Which of the following are isotopes?

A. Carbon-13 and Nitrogen-13

B. Iodine-127 and Iodine-128

C. Radon-222 and Radium-222

Which of the following are isotopes?

A. Carbon-13 and Nitrogen-13

B. Iodine-127 and Iodine-128

C. Radon-222 and Radium-222

Why? Same element, but different

atomic mass.

Putting It All Together

CationCarbon-11

Isotope

Carbon-13 Anion

Boron Nitrogen

Ions

IONSWatch the following video clip and complete the statements below: https://goo.gl/7NuciQ

Ions are formed when a neutral atom gains or loses __________ to become charged.

○ Two Types

○ C______ have a ________ charge

○ A______ have a ________ charge.

Can you explain this comic?

Writing Ions

○ Ions are written with the same atomic symbol as an atom PLUS the ion charge as a SUPERSCRIPT (in the upper right corner).

○ Ex. Mg+2, Cl-, Li+

You Try: Copy and CompleteION ANION OR CATION ELECTRON MOVEMENT

S -2ANION GAINED 2 e-

Na +

Mg +2

N -3

You Try: Copy and CompleteION ANION OR CATION ELECTRON MOVEMENT

S -2ANION GAINED 2 e-

Na + CATION LOST 1 e-

Mg +2 CATION LOST 2 e-

N -3 ANION GAINED 3 e-

Examples

Determine the charge of the following ions then write the complete Atomic Notation

○ Chlorine gains one electron (18 neutrons).

3517 Cl -1

○ Magnesium loses two electrons (12 neutrons).

2412 Mg +2

Gained 1 e-

Lost 2 e-

You Try: Write in your notes○ Determine the charge of the following ions and write

the complete Atomic Notation.

(1) Fluorine gains one electron (7 neutrons)

(2) Sodium loses one electron (12 neutrons)

(3) Aluminum loses three electrons (14 neutrons)

You Try: Write in your notes(1)Fluorine gains one electron (7 neutrons)

169 F -1

(2)Sodium loses one electron (12 neutrons)23

11 Na +1

(3) Aluminum loses three electrons (14 neutrons)27

13 Al +3

If you missed ANY of these…get help!!

RETURN TO YOUR SEAT

PRACTICE YOUR SKILLS !!

Click Here then OPEN THE GAMES

EXIT TICKET – USE YOUR PERIODIC TABLE IN YOUR

REFERENCE TABLE

1. To change Li with no charge to Li with a +1 charge, you need to

2. Fe +2 and Fe +3 are different iron _______:

(integers above would be written as exponents)

3. What is the symbol for an ion which has 8 protons and 10

electrons?

(CHARGES ARE written as exponents)

4. How many electrons does a Lithium ion with a +1 charge

contain?

5. An ion of Beryllium-7 has a charge of +2. Respectively, how

many protons, neutrons, and electrons does this ion contain?

6. An ion of N has a charge of -3. This ion contains:

Atomic Structure Math:

At.#, Mass#, Protons, Neutrons, Electrons

Build an Atom:

Practice Atom and Ion Math

Element Name / Symbol Flashcards

https://goo.gl/kObjLJ

EXTRA Practice:

HOMEWORK

1)QUIZ TOMORROW– Unit 1 (Math, Measurement, Matter)

Safety/Lab Equip

2) Complete Atoms, Isotopes , Ions CW HW

–

ALWAYS BRING YOUR CALCULATOR

IDENTIFY THE ELEMENT

YATTASupplies: Pack of “cards” / Periodic Table

(1) Separate “cards” into two stacks – names and symbols(2) Two people compete against each other(3) A third person is the “caller”(4) Keep track of total cards you earn in each round(5) Rotate until ALL members of group have competed twice

Learning Team Activity