Topic who the fuck knows Flashcards by Jamie Button | Brainscape

Q

What is relative isotopic mass

A

mass of isotopes relative to 1/12th of mass of carbon-12

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Q

What is relative atomic mass

A

mass of an element relative to 1/12th of mass of carbon-12

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Q

what is electron gun

A

shoots electrons at vapourised sample and knocks off electrons

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Q

what is first ionisation energy

A

energy required to remove an electron of one mole gaseous atom to form a +1 ion mole

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Q

what is second ionisation energy

A

energy required to remove an electron of one mole gaseous +1 atom to form a +2 ion mole

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Q

what is sande

A

shielding
attractions
nuclear charge
distance

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Q

what are atomic orbitals

A

tell us the probability of finding an electron in an area

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Q

what do atomic orbitals depend on

A

shape, energy and direction

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Q

chromium and copper rules

A

chromium half fill 3d before 4s

copper full fill 3d before 4s

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Q

metallic bonding melting/boiling

A

energy required to overcome electrostatic attractions between delocal electrons and cations

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Q

metallic bonding elec conductors

A

they have a sea of delocal electrons that conduct current

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Q

forces of simple and giant covalent bonding

A

giant - more intermolecular forces

simple - have less intermolecular forces

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Q

ionic bonding melting/boiling

A

have a strong electrostatic force of attractions so require lot of energy to overcome

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Q

ionic bonding conducts elec when molten or aque

A

ions are free to move and carry charge

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Q

ionic bonding soluble

A

they are polar molecular and in water get conducted by oxygen and hydrogen

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Q

simple covalent low melting/boiling

A

weak intermolecular forces of attractions so little energy to overcome

Q

simple covalent dont conduct elec

A

dont have any free ions so cant carry charge or electrons