Periodicity Flashcards

(5 cards)

1
Q

Across a period covalent radius

A

Decreases

Electron shells stays the same
Nuclear charge increases- more strongly attracted to nucleus

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2
Q

Down a group the covalent radius

A

Increases

Nuclear charge increases
More electron shells
Number of shells outweighs nuclear charge- each extra layer shields the outer electrons from the nucleus so the outer electrons are less strongly attracted to the nucleus

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3
Q

Down a group the electronegativity

A

Decreases

No. of filled electron shells increases- screens the bonded electrons from the nuclear charge so electrons are less strongly attracted to the atom

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4
Q

Across a period electronegativity

A

Increases

Nuclear charge increases

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5
Q

Electronegativity

A

A measure of attraction for electrons in a covalent bond

Higher electronegativity= stronger attraction for electrons

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