Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
Answer:
yes, because water is reacting with air and heat and creating a boiling effect.
Explanation: kracken doge
Answer:
True
Explanation:
There are two types of Van der waals forces which are intermolecular bonds. These bonds are London dispersion forces and Dipole-dipole attractions.
The london dispersion forces are weak attractions found between non-polar molecues and noble gas.
The attractions here is as a result of the fact that non-polar molecules or atoms sometimes becomes polar because the constant motion of its electrons may lead to an uneven charge distribution at an instant. This leads to the formation of a temporary dipole or instantaneous dipole. The dipole can induce the neighbouring molecules to be distorted and they form dipoles as well.
#1...Evaporation
#2....Gas
