Periodicity
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trend in atomic radius across period 3
-decreases, even though there are still the same number of shells -nuclear charge increases as number of protons increases -causes increase in electrostatic forces of attraction
why does shielding effect not increase across period 3
electrons are being added to the same outer shell
trend in first ionisation energy across period 3
-increases -nuclear charge increases -electrostatic forces of attraction between nucleus and electrons increases
trend in melting point across period 3
-increases -in the metals it is due to more delocalised electrons per metal atoms -atomic radius decreases -silicon has a very high melting point as it has a giant covalent structure
What are the different blocks of the periodic table and what determines it
S, P, D, F -determined by electron orbitals