If an element is very reactive then it will will react with other elements to form compounds in nature
not be found in its pure form in nature
all of the above are true
will have to be mined as another substance and converted into its pure form in order for humans to use it

Wind will blow from one direction to another.

Niye yedi puan mal oglu mal

The correct answer is b.hoped i you

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.