Hydrogen and metallic bonding

Hydrogen Bonding Example

High Electroneg.

Atom

Intermolecular

Electronegativity/Hydrogen Bonding

Attraction of hydrogen to a more electronegative atom

Why- no inner electron orbital so very dense for the

smallest atom. So is pulled to other atoms such as N, O,
and F.

1. Must involve high

electroneg. atom

2. Unbonded lone pair

on electroneg atom.

Requirements for H-bonding

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Hydrogen atoms are ​

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which allows them to be very ​

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together when bonded to other ​

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dense

metals

nonmetals

close

Multiple Select

What are the two requirements for a hydrogen bond to form?

• A high electronegative atoms much be present.

• The electronegative atom must have a full octet.

• A low electronegative atoms much be present.

• The electronegative atom must have at least one lone pair.

Hydrogen Bonding Key points

Attraction can occur BETWEEN 2 molecules

of water = intermolecular attraction

Attraction can occur INSIDE or
WITHIN a molecule of water =
intramolecular attraction

But there are two types of

attraction

Dropdown

Intermolecular hydrogen bonding refers to bonds  ​ ​

Select answer

2 different molecules, while intramolecular hydrogen bonding refers to bonds ​

Select answer

of the same molecule. 

Hotspot

Which show an intramolecular bond?

Hotspot

Which show an intermolecular bond?

Another Example of H-Bonding

How does Ammonia molecule form

N =high electronegativity or high attraction to E-
1 Nitrogen and 3 Hydrogen in Ammonia (NH3)

H atoms are bonded to N
It is inside the molecule so
It is intramolecular bonding

H’s not in the same molecule

Are attracted to the lone pair E- on nitrogen

It is between molecules so intermolecular bonding

Hotspot

Find the lone pair that the water molecule is bonding to ammonia

H-Bonding in Daily Life

Holds water together; you are 70% water so you
are held together by them (in-between your cells)
Your hair is made of proteins and your muscles

need proteins to grow.

Your DNA, too.

Multiple Choice

Which of the below are examples of items with hydrogen bonding? 

• water

• proteins

• DNA

• All of them

H-Bonding in Daily Life

- True Water is in constant motion…

ALL THE TIME!!!

- True Water constantly is breaking and

reforming hydrogen bonds and remaking
them

WHY?- hydrogen bond is a weak bond so one molecule of water can break and

remake 2 H-bonds constantly, hence always moving as a liquid

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Liquid water is ​

Select answer

moving because

of the ​

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and ​

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of ​

Select answer

bonds. 

Metallic Bonding

Bonding between metal atoms to
Metal atoms

- Both metals lose electrons to become

positive ions
- Positive ions vibrate faster at a fix

position

- E- freely move through the positive ions

- Lattice Electron Sea Model

Multiple Choice

Metallic bonding allows what type of model to be formed?

• Bohr's model

• solid ball Model

• Planetary model

• Lattice Electron Sea Model

Metallic Bonding-

Electron Sea Model

Delocalized E-

-Unattached E-

​metallic structure, showing
possible electron (e-)paths
around the nuclei of metal atoms
(represented as spheres
with a positive charge)

Metallic bonding can be thought
of as a cloud of positively
charged ions immersed in a sea
of valence electrons

Multiple Choice

The free floating electrons in-between the metal atoms in a metallic bond are referred to as? 

• delocalized

• disassociated

• nonbonding

• bonding

Metallic Bonding-

Electron Sea Model

&

Properties

Allows for:

Metals to be conductors-
Why- Electrons are closer
to together to bump into

each other to transfer

heat

This is NOT

just iron but all
metals (center
and middle of
the Periodic

Table)

Drag and Drop

Closer electrons allow ​

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to have a ​

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melting point and a ​

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boiling point. 

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metals

high

hydrogen

low

Metallic Bonding-

Allows for:

2. Metals to be malleable and ductile-

Why- I. Electrons slide past

each other allowing it to be easily
hammered (malleable) or stretched

into shaped (ductile).

EX: electronics, copper

II. Electrons allow the positive metal

ions to slide across each other to be

stretched into wire.

Dropdown

Metals can be hammered into shape ​

Select answer

​

Metallic Bonding- Electron Sea Model

3 High boiling and melting point

Why: each electron are closer and

strongly attracted to to the positive ion
from the law of opposite attract.

Also allows for metal

to be shaped

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