Periodic Trends - Atomic Radius & Ionisation Energy
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Lesson 6
Last updated 6:12 AM on 3/14/26
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7 Terms
1
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Across a period, atomic radius…
decreases
2
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Down a group, atomic radius..
increases
3
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Across the period, atoms are smaller because there is a …. attraction and the electrons pull…..
stronger attraction, electrons pull closer
4
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Down a group, atoms are bigger because there are… shells and each shell is…from the nucleus
more shells, each shell is farther from the nucleus
5
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Ionisation energy is:
the energy required to remove and electron from an atom
6
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Across a period, ionisation energy…(harder to remove)
increases
7
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Down a group, ionisation energy…(easier to remove)
decreases
