Chemical Bonds

Chemical Bonds

Announcements ​
Notes in OneNote and Page 50
Materials: Periodic Table from science kit or online

• Horizontal groups

• Same properties in common

• Count up by 1 per element

Period

• ​Verticle groupings

• Tells how many valence electrons are in each element (using the ones pace) in the TALL groups

​​Groups

• Outter-most level of the electron cloud

• This is different in each group of the periodic table

• Different levels hold different amounts of electrons

Valence Electrons

Hotspot

This is a Lewis Dot structure- a way to represent all the parts of an atom easily.

In our Lewis Dot structures, we will ONLY focus on the valence electrons.

Identify ALL the valence electrons in the picture

In the chat- how many valence electrons does Oxygen have?

Multiple Choice

What is the easiest to do?

• Empty an almost full box into an almost empty box

• take 1-2 things out of an empty box and put them into an almost full box

• Empty all boxes and put some in both boxes- filling neither

• Refers ONLY to the valence electron level

• 8 valence electrons = stable

• Easier to empty the Valence electron level with fewer electrons

• Easier to fill a valence electron level with more electrons

​

Octet Rule

Match

Match the following

• Will gain 1 valence electron

• Will lose 1 electron

• Will lose 3 electron

• Atom will gain 3 valence electrons

Atom has 7 valence electrons

Atom has 1 valence electron

Atom has 3 valence electrons

Atom has 5 valence electrons

• Atom has 7 valence electrons

• Atom has 1 valence electron

• Atom has 3 valence electrons

• Atom has 5 valence electrons

Write the symbol in the middle

Step 1

Use your periodic table to find how many valence electrons the element has

​​Step 2

​Draw 1 dot on each side of the symbol (4)

It doesn't matter which side you choose

Step 3

Pair up any dots that are left over

​​Step 4

​Lewis Dot structures How To:
Complete this for the Notes on page 50

Draw

This style question WILL be on your next assessment

Create a Lewis Dot structure for Nitrogen here:

Symbol in the middle and dots on the outside.

Draw

Create a Lewis Dot structure for Silicon here:

Symbol in the middle and dots on the outside.

Use your periodic table to ensure you have the correct symbol

Set of letters and numbers that represent a compound
(Compound- 2 + elements bonded together)

​​Parenthesis = Multiplication

Subscript- the small number below the letters of an element
Tells how many of THAT atom are in a compound

How to read:

​Chemical Formula- write in Notes page 50

​​Chemical Formula

Original Chemical Formula- Mg(NO₃)₂

What it looks like-
Mg NOOO NOOO

Totals:
Mg= 1 N= 2 O= 6

Match

Match the number of atoms in each part of the compound:

C₂OH₆

• 2

• 1

• 6

• 0

C (Carbon)

O (Oxygen)

H (Hydrogen)

Co (Cobalt)

• C (Carbon)

• O (Oxygen)

• H (Hydrogen)

• Co (Cobalt)

Drag and Drop

How many atoms of each element are here:

Cu₃(PO₄)₂

Cu= ​

Placeholder

P= ​

Placeholder

​

O = ​

Placeholder

Drag these tiles and drop them in the correct blank above

3

2

8

1

6