Position of Hydrogen in Periodic Table — Prelims Questions

Which of the following properties of hydrogen is *most similar* to that of alkali metals?

Which of the following properties of hydrogen is *most similar* to that of halogens?

Which statement correctly describes a reason for hydrogen's anomalous position in the periodic table?

Which of the following is a *dissimilarity* between hydrogen and alkali metals?

Which of the following statements about hydrogen's electron affinity is correct?

Which of the following statements about hydrogen's ionization enthalpy is correct?