Bonding and metals Flashcards
Explain ionic bonding
When metals react with non metals they transfer electrons to the non metal atom
Does the charge change in ionic bonding
Yes
Gaining an electron - negative
Loosing an electron - positive
How are the oppositely charges ions of a giant ionic lattice held together
By a strong electrostatic force of attraction
What is the melting point of a ionic substance like
High
The electrostatic force of attraction is strong and uses a lot of energy to break
Can solid ionic substances conduct electricity and why
No
Ions are fixed in position
Can melted or dissolved ionic substances conduct electricity and why
Yes
Ions are free to move and carry charge
What is the structure of metals/metallic bonding
Positive metal ions in rows
Electrons are delocalised and can move
They are attracted to each other by electrostatic force of attraction
Why are pure metals malleable
Layers can Slide Over each other
Are metals good conductors and why
Yes
Delocalised electrons are free to move throughout the structure
Do metals have a high melting and boiling point and why
Yes
Electrostatic force of attraction between positive metal ions and delocalised electrons is strong so requires lots of energy to break
Why are alloys used
Pure metals are often too soft
How to create an alloy and explain the change
Adding atoms of a different element to disturb regular arrangement so layers can no longer slide creating a harder material
