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Atomic Radii down a column ___________ Increases
Give two reasons for change in atomic radii down columns New energy shell & Screening effect of inner electrons
Define atomic radius Half the distance between the nuclei two covalently bonded atoms of the same element
Atomic radii across a period ___________ Decreases
Give two reasons for change in atomic radii across a period Increase in effective nuclear charge & No increase in screening effect
Define first ionisation energy Energy required to remove losest electron from its bond with an atom in its ground state
Values for first ionisation energy __________ down a column Decrease
Give two reasons for the change in first ionisation energy down a column Increasing atomic radii & Screening effect of inner electrons
Values for first ionisation energy __________ across a period Increase
Give two reasons for the change in first ionisation energy across a period Increasing effective nuclear charge & Decrease in atomic radii
Define electronegativity Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons
Values for electronegativity __________ across a period Increase
Give two reasons for the change in electronegativity values across a period Increasing effective nuclear charge & Decrease in atomic radii
Values for electronegativity __________ down a column Decrease
Give two reasons for the change in electronegativity values down a column Increasing atomic radii & Screening effect of inner electrons
Created by: JackEatonK98