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BTEC Applied Science: Unit 9 Learning aim C
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BTEC Applied Science: Unit 9 Learning aim C
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BTEC Applied Science: Unit 9 Learning aim CAtomic No.= - ANSWER Number of protons
Relative atomic mass= - ANSWER Number of protons + Number of Neutrons
Sub-shells of electrons - ANSWER S,P,D
Orbitals - ANSWER Regions of space that electrons are most likely to fill
The maximum number of electrons an orbital can hold - ANSWER Two
Number of Orbitals in the S subshell - ANSWER 1
Number of Orbitals in the P subshell - ANSWER 3
Number of Orbitals in the D subshell - ANSWER 5
Electrons enter the ? energy orbital available - ANSWER lowest
Electrons prefer to occupy orbitals ? - ANSWER on their own
S block - ANSWER Groups 1+2
D block - ANSWER Transition metals
P block - ANSWER Groups 3-8
Concentration (moldm-3) = - ANSWER number of moles/volume(dm3)
? are lost when an ion is formed - ANSWER The highest energy electrons
The energy required to remove one electron from one mole of a gaseous atom -
ANSWER First Ionisation energy
Ionisation energy down groups - ANSWER Decreases because more shielding,
easier to lose one electron
Ionisation energy across periods - ANSWER Increases because more nuclear
charge, harder to lose one electron
Ionic Bonding - ANSWER Between metals and non-metals, gaining or losing
electrons.
Strong electrostatic force of attraction between oppositely charged ions.
Covalent Bonding - ANSWER Between non-metals, sharing electrons .
Strong attraction between two positive nuclei and shared pair of electrons.
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