# Periodic Block Presentation

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Published on February 1, 2008

Author: itamarita1984

Source: slideshare.net

## Description

periodic block notes

Periodic Blocks Chapter 6

Quick review (Stuff u should know already!!!!) What is a valence electron? Electrons in the highest principle energy level What’s the principle energy level? 1, 2, 3, 4, 5…. (n) Remember Aufbau diagram…

What is a valence electron?

Electrons in the highest principle energy level

What’s the principle energy level?

1, 2, 3, 4, 5…. (n)

Remember Aufbau diagram…

Sublevels How many electrons in s? 2 How many electrons in p? 6 How many electrons in d? 10 How many electrons in f? 14

How many electrons in s?

2

How many electrons in p?

6

How many electrons in d?

10

How many electrons in f?

14

Observations???

Observations What was the connection between period number and the elements that you were assigned? Valence electrons? Principle quantum number? Sublevel? Orbital? Partially filled or completely filled?

What was the connection between period number and the elements that you were assigned?

Valence electrons?

Principle quantum number?

Sublevel?

Orbital?

Partially filled or completely filled?

Period # & Valence electrons The energy level of the valence electrons of an element tell you the period that it will be in (the row!!!) Remember, energy level is your principle quantum number (n)

The energy level of the valence electrons of an element tell you the period that it will be in (the row!!!)

Remember, energy level is your principle quantum number (n)

S-Block Groups 1a and 2a Valence electrons occupy only s-orbitals Group 1a  partially filled s Group 2a  completely filled s How many max electrons can an s-orbital hold? Soooo how many groups are going to makeup the s-block? 2

Groups 1a and 2a

Valence electrons occupy only s-orbitals

Group 1a  partially filled s

Group 2a  completely filled s

How many max electrons can an s-orbital hold?

Soooo how many groups are going to makeup the s-block?

2

So what sublevel do we go to after we fill an s-sublevel? P-sublevel….

P-sublevel….

P-block How many orbitals does the p sublevel have? 3…remember, three lines _ _ _ Do you think we will have more or less electrons here than the s-block? MORE!!! Groups 3a thru 8a Why is there no p-block elements in period 1? Because at energy level (principal quantum #) 1, we do not have any p sublevels How many max electrons can a p-sublevel hold? SO how many groups is the p-block going to have? 6

How many orbitals does the p sublevel have?

3…remember, three lines _ _ _

Do you think we will have more or less electrons here than the s-block?

MORE!!!

Groups 3a thru 8a

Why is there no p-block elements in period 1?

Because at energy level (principal quantum #) 1, we do not have any p sublevels

How many max electrons can a p-sublevel hold?

SO how many groups is the p-block going to have?

6

Noble gases in P-block What do we notice about their s and p orbital??? They are completely full So they are stable…no chemical reaction Important later when we talk about ions….

What do we notice about their s and p orbital???

They are completely full

So they are stable…no chemical reaction

Important later when we talk about ions….

Welcome to the D-Block! Contains transition metals How many elements are going to reside on the D-block? Lots! There are many exceptions but…. Filled outermost s-orbital of energy level n Filled or partially filled d-orbitals of energy level n-1 What happens to the d orbitals as we move across a period? How many groups do you think are going to make up the d-block? Hint: How many electrons can a d-sublevel hold? 10!!!!

Contains transition metals

How many elements are going to reside on the D-block?

Lots!

There are many exceptions but….

Filled outermost s-orbital of energy level n

Filled or partially filled d-orbitals of energy level n-1

What happens to the d orbitals as we move across a period?

How many groups do you think are going to make up the d-block?

Hint: How many electrons can a d-sublevel hold?

10!!!!

F-Block elements…uh-oh…. What do we have left on the periodic table? Lanthanide and actinide series (inner transition metals) They fall into periods 6 and 7 Characterized by: Filled or partially filled outer most s-orbital Filled or partially filled 4f and 5f orbitals Sorry guys…these electrons in the f-block do not fill in a predictable manner How many columns are going to make up the f-block? Hint: How many electrons can an f-sublevel hold? 14!!!!

What do we have left on the periodic table?

Lanthanide and actinide series (inner transition metals)

They fall into periods 6 and 7

Characterized by:

Filled or partially filled outer most s-orbital

Filled or partially filled 4f and 5f orbitals

Sorry guys…these electrons in the f-block do not fill in a predictable manner

How many columns are going to make up the f-block?

Hint: How many electrons can an f-sublevel hold?

14!!!!

So…. Now we see why the periodic table has that funny shape! We can now also do electron notations in less tedious manner!

Now we see why the periodic table has that funny shape!

We can now also do electron notations in less tedious manner!

Tell me what happens…. To the principle energy levels as we move down a period? Princ. E level increases To the number of sublevels containing electrons as we move down a period? Increases too!!!

To the principle energy levels as we move down a period?

Princ. E level increases

To the number of sublevels containing electrons as we move down a period?

Increases too!!!

Practice problems!!! Periodic tables away!!! Tell me the group, period, and block of an atom with the following electron configurations: [Ne]3s 2 [He]2s 2 [Kr]5s 2 4d 10 5p 5

Periodic tables away!!!

Tell me the group, period, and block of an atom with the following electron configurations:

[Ne]3s 2

[He]2s 2

[Kr]5s 2 4d 10 5p 5

Answers [Ne]3s 2 Group 2a Period 3 S-block [He]2s 2 Group 2a Period 2 S-block [Kr]5s 2 4d 10 5p 5 Group 7a Period 5 p-block

[Ne]3s 2

Group 2a

Period 3

S-block

[He]2s 2

Group 2a

Period 2

S-block

[Kr]5s 2 4d 10 5p 5

Group 7a

Period 5

p-block

More problems… Write the electron configuration for the following elements: The group 4b element in the fifth period? The group 1a element in the seventh period?

Write the electron configuration for the following elements:

The group 4b element in the fifth period?

The group 1a element in the seventh period?

Answers The group 4b element in the fifth period? Zirconium [Kr]5s 2 4d 2 The group 1a element in the seventh period? Francium [Rn]7s 1

The group 4b element in the fifth period?

Zirconium

[Kr]5s 2 4d 2

The group 1a element in the seventh period?

Francium

[Rn]7s 1

REPRESENTATIVE BLOCK PARTY!!! Make cube…how many sides is this? 6 Side 1…Artistically symbol of element with vitals Side 2…Label the elements group Side 3…Write the element’s electron configuration Side 4…Illustrate/describe Properties of the element Side 5…Illustrate/describe Uses of element Side 6…Important compounds this element is found in

Make cube…how many sides is this?

6

Side 1…Artistically symbol of element with vitals

Side 2…Label the elements group

Side 3…Write the element’s electron configuration

Side 4…Illustrate/describe Properties of the element

Side 5…Illustrate/describe Uses of element

Side 6…Important compounds this element is found in

Periodic Trends What’s a trend

What’s a trend

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