Periodicity

Question 0

How and why does atomic radius change across a period?

Answer 0

Greater nuclear charge
Greater electrostatic force of attraction between nucleus and electron
No change in shielding

Atomic radius decreases

Question 1

What is periodicity?

Answer 1

A pattern in chemical properties across a row in the periodic table which is repeated in each row

Question 2

How and why does electronegativity change across a period?

Answer 2

Greater nuclear charge
Greater electrostatic force of attraction between nucleus and electron
No change in shielding

Electronegativity increases

Question 3

How does electrical conductivity change across the period?

Answer 3

Metals increases along as more delocalised electrons. Simple covalent do not conduct electricity

Question 4

How does melting point change along a period?

Answer 4

Increases with metals reaches a peak at giant covalent is or C then drops at simple covalent