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level: Level 1 of Periodicity

Questions and Answers List

level questions: Level 1 of Periodicity

QuestionAnswer
elements are arranged by theincreasing atom number
Ionisation energy isenergy required to remove 1 mole electron from one gaseous atoms to produce one mole of gaseous of 1+ ion
Factors affecting ionisation energyatomic radius - decreases across a period nuclear charge -increases across a period electron shielding - stays same across a period and changes down a group
Atomic radius ...the greater the distance between the nucleus and the outer electrons, the less nuclear attraction so less force of attraction
Nuclear charge....the more protons they are , the greater the attraction between the nucleus and outer electrons
Electron shieldingthe negatively charged inner electrons repel the outer electrons so repulsion reduces the attraction between the nucleus and outer electrons
Succesive ionisation energies- stripping -proton:electron ratio increases