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Periodic Trends Ch-6 sec-3

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Page 1: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Periodic TrendsCh-6 sec-3

Page 2: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Atomic SizeAtomic Size is measured as half the distance

between two nucleiSize generally decreases with atomic number

within a periodSize generally increases with atomic atomic

number within a group.

Page 3: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Atomic Size

Page 4: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Atomic Size

Page 5: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Atomic size

Page 6: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size
Page 7: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionization EnergyThe energy required to remove an electron

from an atom.1st, 2nd, 3rd…ionization energys1st ionization energy generally decreases

from top to bottom within a group1st ionization energy generally increases from

left to right within a period

Page 8: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionization Energy

Page 9: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionization Energy

Page 10: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Main Group Ionization Energy

Page 11: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionization Energy

Page 12: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ion sizeCations = positive ions resulting from loss of

an electronAnions = negative ions resulting from gain of

electronsGroup trend: increases down a groupPeriodic trend: varies (general decrease )

Page 13: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionic Size

Page 14: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Ionic Size

Page 15: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

ElectronegativityThe ability for an atom to attract electrons

when the atom is in a compoundRated on a scale of 0-4Values decrease from top to bottom in a

groupValues increase from left to right within a

period

Page 16: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Trends in Electronegativity

Page 17: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size
Page 18: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

electronegativity

Page 19: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Electron AffinityThe energy change that occurs when an

electron is acquired by a neutral atom Most atoms release energyPeriodic trend: generally increase from left to

rightGroup trend: somewhat irregular, slightly

decreases from top to bottom

Page 20: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Electron Affinity

Page 21: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Electron Affinity

Page 22: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Electron Affinity

Page 23: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Other TrendsNuclear charge: increase of

protonsIncreases across and downHelps to explain other trends

ShieldingIncreases downConstant across

Page 24: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

summations

Page 25: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

Summations

Page 26: Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size

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