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Here are the answers to 2020-2021 Additional Periodic Table Trend Homework.
1. Atomic size decreases as you go across a Period. Since the nuclear charge is increasing causing a greater pull to valence electrons (greater CF) the valence electron are closer (since they are on the outside of atom, they determine size of atom).
2. Aligned from smallest to largest Atomic radii, Ne, P, Cr, Ca, Cs
3. Hold on to valence (or have other element's valence electron attract to it.
Since the nucleus in non-metal elements tend to have greater pull on the valence electrons (higher CF), it takes more energy to have those valence electron be release so tend to stay (sometime it is called sharing) and valence electrons from other atoms could be drawn to the non-metal nucleus (non-metal element could take these electron causing a negatively charged ion called anion).
4. Atomic radii (AR) are also larger than Ionic radii (IR) for metal elements. This is due to the fact that metals tend to release their valence electrons (tend to have low CF). The "new" valence electrons are in the energy level below that is closer to nucleus that causes CF to increase (also there is an imbalance between negative charge (electrons) and positive charge (protons)).
5. MC increases as you down a Group.
6. Bottom left
7. Cl, S, As, Ag, Ba