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How Atoms Combine How Atoms Combine

How Atoms Combine - PowerPoint Presentation

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Uploaded On 2015-11-10

How Atoms Combine - PPT Presentation

73 in your textbook How atoms combine Atoms with a full valence shell are very stable Only the Noble gases are considered stable and therefore unreactive Elements that have unfilled valence shells combine with other elements ID: 188988

atoms metals called combine metals atoms combine called elements valence stable bond ionic electrons form forming atom chemical ions

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Slide1

How Atoms Combine

7.3 in your textbookSlide2

How atoms combine

Atoms with a full valence shell are very stable

Only the Noble gases are considered stable and therefore unreactive

Elements that have unfilled valence shells combine with other elements

- Atoms become more stable by gaining (

anion

), losing (

cation

) or sharing electronsSlide3

3 Different Combinations

Metals and Non-Metals

Metals and Metals

Non-Metals and Non-MetalsSlide4

Metals and Metals

2 metals are melted and then solidified, forming a mixture

Mixture called an

alloy

Metal atoms do NOT combine chemically

Classified as solutions

Ex.

Sterling silver (Ag + Cu) Brass (Cu + Zn)Slide5

Metals and Non-Metals

Metals become

cations

and non-metals become anions

Together they form ionic compounds

The attraction between these ions forms a chemical bond called an

ionic bond

These compounds can grow to large sizes forming crystals

Example: Sodium Chloride (NaCl

)Slide6

Non-Metals and Non-metals

These elements do NOT form ions

The nucleus of one atom attracts the valence electron of the other atom and vice versa

They both share these electrons

The chemical bond formed is called a

covalent bond

Also called a

covalent compound

Ex.Chlorine gas (Cl

2)