Trends to Know

[DomMaiorca_1I]

For the midterm, I know the important trends to know are atomic radii, ionic radii, and ionization energy. Are there any other trends I'm forgetting that we should definitely know? And if so, could you explain the trend?

[MeghetyManoyan1A]

There's the trend of electronegativity. As you move from left to right, electronegativity increases, and as you move from top to bottom, electronegativity decreases, with some exceptions.

[Amanda 1A]

what would the specific exceptions be or what trend do the exceptions follow? or are they not relevant to what we would need to know for the midterm?

[Harmonie Ahuna-1C]

Another trend is electron affinity. Electron affinity tells how how much energy must either be supplied (-) or is released(+) when an electron attaches to an atom. It generally increases as you move right and up along the periodic table. However, noble gases in group 18 have low ones because they're already stable. There may be some other exceptions shows on figure 2.28 on pg 56 of the textbook.

[Shione Nakahara 1F]

I think you should know how electron affinity increases from left to right within a period (caused by the decrease in atomic radius) and how electron affinity decreases from top to bottom within a group (caused by the increase in atomic radius).

[hannahtweedy]

All the ones listed so far are the only ones we went over in Step Up

[Madeleine Farrington 1B]

Another trend is electron affinity. Electron affinity tells how how much energy must either be supplied (-) or is released(+) when an electron attaches to an atom. It generally increases as you move right and up along the periodic table. However, noble gases in group 18 have low ones because they're already stable. There may be some other exceptions shows on figure 2.28 on pg 56 of the textbook.

Why does electron affinity increase as you move up along the table? I was under the impression that atoms further to the right had increased affinity because they are closer to achieving the stable state of a full valence shell, but how does this correspond to moving up the table?

[Jennifer Tuell 1B]

I'm pretty sure this won't be on the midterm. The midterm covers Chapter 1 and 2 and the Fundamentals.

[SammiOrsini_1B]

I thought electron affinity was apart of chapter 2, I am just not positive if we specifically covered that in class.

[Rummel Requerme 1E]

Professor Lavelle said to only worry about Chapter 1, 2, and the Fundamentals. Best to review Outline 1 & 2!

[Maria Roman 1A]

Trends to know would be the atomic radius, cation and anion trends, ionization energy, and electronegativity

[breannasung_1K]

It might be best to know the trends for electron affinity. Electron affinity increases as ionization energy increases.

[JooHyun Koh 1H]

Yea, My TA said that Professor Lavelle didn't really cover electron affinity and said it would most likely not be on the exam.