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
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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)