Chemistry bonding

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What is the definition of bonding?
An ionic bond is the electrostatic force of attraction between oppositely charged ions formed by electron transfer
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When is the ionic bonding stronger and the melting point is higher?
The ions are smaller
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What is a covalent bond?
A shared pair of electrons
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What is a dative covalent bond?
It forms when the pair of electrons in a covalent bond come from only one of the bonding atoms.
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What is the definition of a metallic bond?
The electrostatic force of attraction between the positive metal ions and the delocalised electrons
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What are the three main factors that affect the strength of a metallic bond?
Number of protons, number of delocalised electrons and the size of the ion
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What is an ionic bond?
Electrostatic force of attraction between oppositely charged ions
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For example?
Sodium chloride, magnesium oxide
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What is the structure of a covalent bond?
Simple molecular
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With what forces?
intermolecular forces(van der waals, permanent dipoles and hydrogen bonds between molecule
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for example?
iodine, ice, carbon dioxide, water and methane
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What are examples of a macromolecule?
Diamond Graphite, silicon dioxide and silicon
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What is metallic bonding?
Electrostatic forces between the metal posistive ions and delocalised electrons
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for example?
Magnesium, sodium- giant metallic structure
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Why does a molecular structure have low BP/MP?
Because of weak intermolecular forces between molecules(eg; van der waals/ hydrogen
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why are metals malleable?
The positive ions in the lattice are identical so the planes can slide easily over eachother
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Why can graphite conduct electricity?
Free delocalised electrons between layers
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what is the definition of electronegativity?
The relative tendency of an atom in a covalent bond to attract electrons in a covalent bond to itself
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Why does electronegativity increase across a period?
The number of protons increases
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Why does the atomic radius decrease?
The electrons in the same shell are pulled in more
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What happens down a group?
decreases down a group because the distancebetween the nucleus and the outer electrons increases and the shieldingof inner shell electrons increases.
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Why is I2 a solid and CL2 a gas?
Increasing number of electrons in the bigger molecules causing an increase in the size of van der waals between molecules
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Other cards in this set

Card 2

Front

When is the ionic bonding stronger and the melting point is higher?

Back

The ions are smaller

Card 3

Front

What is a covalent bond?

Back

Preview of the front of card 3

Card 4

Front

What is a dative covalent bond?

Back

Preview of the front of card 4

Card 5

Front

What is the definition of a metallic bond?

Back

Preview of the front of card 5
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