Periodic Trends Across Period 4 (Group 13–16 Focus)

Preview · 10 questions

• 01·Which element has atomic number 31 (the first element of period 4 in groups 13–16 range)?
• 02·Across period 4 from Ga (Z=31) to Kr (Z=36), the general trend in atomic radius is to:
• 03·Which period-4 element shows a noticeably smaller atomic radius than expected because of the 3d electron poor shielding (the d-block contraction)?
• 04·Among the period-4 elements Ga, Ge, As, and Se (groups 13–16), which is the most metallic?
• 05·Which of the following period-4 elements (Ga, Ge, As, Se) has the highest first ionization energy?
• 06·Which element in the Z=31–40 range is the halogen?
• 07·Which element in the Z=31–40 range is a noble gas?
• 08·Which period-4 element is the carbon-group (group 14) member — commonly showing a +4 oxidation state analogous to carbon?
• 09·Among Ga, Ge, As, and Se (period 4, groups 13–16), which is the least metallic (most nonmetallic)?
• 10·Within Z=31–40 (Ga → Zr), which element typically has the smallest atomic radius?