C9. Periodic Table
True or False: The colour of elements turn lighter going down Group VII in the Periodic Table
False, the colour will turn darker as we go down group 7!
Shabul fills the balloon with helium to surprise Sodul for his birthday! Why does Shabul use helium instead of hydrogen?
Helium is a noble/stable gas. Using hydrogen may cause explosion!
Rehana reacts lithium with water. If she dips a litmus paper in the reaction solution, what will she observe?
She will observe colour change to blue! The reaction produces lithium hydroxide, an alkali. Do you know the other byproduct?