Which of the following has the maximum tendency for hydrate formation?

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Why?

$Fe$ is placed in the eighth group of the periodic table. What is the number of electrons in its outermost orbit?

Use the periodic table to answer the following questions.
$(a)$ Identify an element with five electrons in the outer subshell.
$(b)$ Identify an element that would tend to lose two electrons.
$(c)$ Identify an element that would tend to gain two electrons.
$(d)$ Identify the group having metal,non-metal,liquid as well as gas at room temperature.

How does the metallic and non-metallic character vary on moving from left to right in a period?

Which one of the following is most basic?