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State the 3 ways the periodic table is arranged
Increasing atomic number, repeating patterns and trends of physical and chemical properties and in groups with similar chemical properties
Define 1st ionisation energy
The energy required to remove 1 mole of electrons from 1 mole of gaseous atoms to form 1 mole of gaseous 1+ ions
Write 1st ionisation energy equation for sodium
Na (g) --> Na+(g) + e-
Describe how ionisation energy changes for BOTH across a period and down a group
Across the period IE increases
Down group IE decreases
Describe the 4 factors you always need to mention in an Ionisation energy Q
Nuclear charge
Atomic radius
Shielding
Nuclear attraction
TRUE OR FALSE: Nuclear charge decreases down a group
FALSE
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