Introducing 

Prezi AI.

Your new presentation assistant.

Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.

Loading…
Transcript

Shells

2

8

8

The outer most shell is

called the Valence Shell

it show the

Valence Electrons

If the outer most shell is full

that element is considered to

be stable

If 8 electrons in the outer most

shell is called a stable octet

Practice Problems

p.176 - all

The Valence shells of all atoms are being filled

to the lowest energy {most stable}

Bohr diagrams can show simple

covalent bonds - note where the

shared electrons are

Vocab

Bohr Diagram

Stable octet

Cations

Anions

Ionic Bonding

Covalent bonding

Covalent compound

Molecule

Bonding pair

Lone pair

Reading Check p.178

point form

Covalent Bonding

Bohr Diagrams, Ionic Bonding,

Covalent Bonding, Lewis Diagrams

Atoms overlap and share an unpaired electron between them

Non-metallic atoms share electrons to form the bond

Covalent molecule is a group of atoms bound by electron sharing

The pair of electrons being share is called the "Bonding pair"

Co =sharing/together

Valent = Valence = Latin for strength/power

Ionic Bonding

Contains a positive ion, (metals) and a negative ion (non-metal

one or more e transfers from each metal aton to each non-metal ion

Forming Compounds

Lewis Diagrams

When atoms touch their valence electrons interact

The more stable an atom, ion or compound the lower the energy state. {Think Noble Gases}

Compounds can achieve this lower energy state by

1 Atoms of metals may lose electrons to other atoms forming cations

2 Atoms of non-metals may gain electrons from other atoms forming anions

3 Atoms may share electrons

2 e

1 e

A Lewis Diagram only shows the Valence

electrons and illustrates chemical bonding

Rules

Dots represent electrons place around symbol at

Cardinal directions {N,E,S,W}

Dots places singly until fifth electron is added,

then start pairing

7 e

Bohr Diagrams

What grouping an element is put into and how they react is dependent on how many electron they have.

For us to see this we map out the electrons using the Niels Bohr system.

Lewis for Covalent

For covalent bonding atoms share electrons, this is shown by a simple line

Lewis for Ions

Use Square Brackets to show that the element is in ion form and show your charges.

One element should have 8 electrons

Learn more about creating dynamic, engaging presentations with Prezi