Do now
This presentation is the property of its rightful owner.
Sponsored Links
1 / 29

Do Now PowerPoint PPT Presentation


  • 50 Views
  • Uploaded on
  • Presentation posted in: General

Do Now. Draw a bohr model for Boron. Do Now. Describe what makes a source reliable and accurate?. Atomic Number, Atomic Mass, and Isotopes. Happy Pt Tuesday!!!!. By the end of the class today I will be able to…. Student will understand the symbol for an isotope.

Download Presentation

Do Now

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Do now

Do Now

  • Draw a bohr model for Boron


Do now1

Do Now

  • Describe what makes a source reliable and accurate?


Atomic number atomic mass and isotopes

Atomic Number, Atomic Mass, and Isotopes

Happy Pt Tuesday!!!!


By the end of the class today i will be able to

By the end of the class today I will be able to…

  • Student will understand the symbol for an isotope


Do now

If we made a scale model of an atom and wanted to use Cowboy Stadium as our electron cloud, the nucleus of the atom would be the size of the eraser on the end of your pencil. An electron would still be smaller than the point on a straight pin.


What do these boxes mean

What do these boxes mean??

Number of protons/ Atomic Number

All atoms of the same element have the same number of protons


Number of protons neutrons electrons

Mass Number

p+

e-

n0

Number of Protons, Neutrons, & Electrons

# Protons =

How to Use the Periodic Table

# Electrons =

# Neutrons =

-

=

Example 1: Argon


Isotope symbol

Isotope Symbol

X: element symbol


Isotope symbol1

Isotope Symbol

A: Mass Number

#protons + # neutrons in the nucleus

Always larger than Z


Isotope symbol2

Isotope Symbol

Z: Atomic number

#protons


2 ways to write isotope symbol

2 Ways to write Isotope Symbol

Or Sodium-23

Na

23

11


Isotopes of sodium

Isotopes of Sodium

Na

Na

23

24

11

11


Example problem

Example Problem

  • Write the nuclear notation for the chemical element that has 6 protons and 8 neutrons


Do now

#1

  • Write the Nuclear notation for the chemical element that has 17 protons and 16 neutrons (in your table)

Clor Chlorine-33

33

17


Do now

#2

How many protons are in the isotope 54Cr? (Chromium-54) (add it to your table)

24 (like every atom of Chromium)


Do now

#3

How many neutrons are in the isotope 42Ca? Number or protons? (add it to your table)

22 neutrons


Do now

#4

How many electrons are in the isotope 23Na? Write it’s nuclear notation (add to table)

11 electrons


Average mass of subatomic particles

Average Mass of Subatomic Particles

Atomic Mass Unit

1 amu= 1.66 x 10-24 g


Example

x

# e-

# p+

# n0

Mass of n0

Mass of p+

Protons

Example

Example 7: Mass of Beryllium

x

x

+

+

+

+

=

=

Mass of e-

Neutrons

Electrons

4 Protons

4 Electrons

5 Neutrons


Example 2 3

Example 2 & 3

Sodium

Fluorine


Gallery walk

Gallery walk

  • Walk around to the different pictures of isotopes

  • Identify which isotope it is and fill out the information in your packet

  • Figure out – WHAT IS THE DIFFERENCE?


Isotope

Definition

Examples

Isotope

Non-Examples

Drawing or Traits

iSOTOPE


Atoms of the same element with different numbers of neutrons therefore have different masses

Atoms of the same element with different numbers of neutrons (therefore have different masses).

Isotopes


Compare contrast

COMPARE/CONTRAST


Four isotopes of helium

Four Isotopes of helium

What sub-atomic particle(s) are the same for the isotopes of Helium?

What sub-atomic particle(s) are different for the isotopes of Helium?

Are these four isotopes neutral? Why or Why not?


Workout

Workout!

Write the following as an isotope symbol…

4. Copper-63

5. Copper-64

6. Lithium-7

7. Lithium-6


Example problem1

Example Problem

  • How many neutrons are in the isotope of 26Mg?

Number of Neutrons = A-Z


Do now

#1

How many neutrons are in the isotope 48Ti?

26 neutrons


Example problem2

Example Problem

How many electrons are in the isotope 23Na? (you can assume the atom is neutral)

11 electrons


  • Login