Discover Questions

Why a hydrogen atom is required to establish a hydrogen bond? Arrange the elements from highest radius to the lowest radius.
Al,P,CI,Na,S,Si,Mg,Ar? I need a pic of her so I can prove the is mine as I never opened the box doll intact but BC gone it's a legacy from my mom? If a=4i-j+k and b=2i-2j+k, then find a unit vector parallel to the vector a+b? The sum of a number and twice its squared is 105. Find the integer.?