Periodic trends: ionization energy, radius and electron affinity

Sub-topic 1 2023 · National Preliminary Free

Periodic trends in first ionization energy and isoelectronic ionic radii (true/false)

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Sub-topic 2 2026 · National Preliminary Premium

Periodic trends in first ionization energy and isoelectronic ionic radii (true/false)

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Sub-topic 3 2026 · National Preliminary Premium

Periodic trends in first ionization energy and isoelectronic ionic radii (true/false)

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Sub-topic 4 2026 · National Preliminary Premium

Periodic trends in first ionization energy and isoelectronic ionic radii (true/false)

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Sub-topic 5 2026 · National Preliminary Premium

Periodic trends in first ionization energy and isoelectronic ionic radii (true/false)

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Sub-topic 6 2024 · National Preliminary Premium

Effect of atomic radius, nuclear charge and shielding on first ionization energy

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Sub-topic 7 2023 · National Preliminary Premium

Atomic number is not simply proportional to density, atomic size, or discovery order (true/false)

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Sub-topic 8 2003 · National Semifinal Premium

Trend of atomic radius and atomic number across a period (b, c, n, o)

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Sub-topic 9 2013 · National Preliminary Premium

Why first ionization energy decreases down a group

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Sub-topic 10 2013 · National Preliminary Premium

Why first ionization energy increases across a period

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Sub-topic 11 2013 · National Preliminary Premium

Why attractive force on valence electrons increases across a period

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Sub-topic 12 2020 · National Preliminary Premium

Factors beyond shielding affecting first ionization energy

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Sub-topic 13 2020 · National One-Eighth Premium

Atomic size decreasing across period 2 (li to ne)

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Sub-topic 14 2020 · National One-Eighth Premium

Atomic size decreasing across period 3 (na to ar)

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Sub-topic 15 2020 · National One-Eighth Premium

Enthalpy of atomization decreasing down group 13

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Sub-topic 16 2021 · National Quarterfinal Premium

Sulfur has the lowest first ionization energy among cl, p, and s

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Sub-topic 17 2023 · National Preliminary Premium

Identifying the element with highest electron affinity in an unrecorded comparison set

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Sub-topic 18 2023 · National Preliminary Premium

True or false: allotropes arise from differences in neutron number or atomic radii

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Sub-topic 19 2023 · National Preliminary Premium

True or false: rb+ and se2- are isoelectronic (both reach the krypton configuration)

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Sub-topic 20 2023 · National Preliminary Premium

True or false: cs+ and i- are isoelectronic (both reach the xenon configuration)

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Sub-topic 21 2023 · National Preliminary Premium

True or false: sr2+ and as3+ are isoelectronic

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Sub-topic 22 2023 · National Preliminary Premium

True or false: atomic number increases proportionally with atomic size

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