ANSWER BRIEFLY.................................. !
Answers
Step-by-step explanation:
1.
Ice floats on water because it is less dense than water. When water freezes into its solid form, its molecules are able to form more stable hydrogen bonds locking them into positions.
2.
Valence shell electron pair repulsion(VSEPR) theory is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. It is also named the Gillespie-Nyholm theory after its two main developers, Ronald Gillespie and Ronald Nyholm.
Answer:
Hlo di
Step-by-step explanation:
● In ice each oxygen atom tetrahedraly surrounded by 4 hydrogen atom.Two out of which are bonded by covalent bonds and other two by hydrogen bonds. Since we know H bond is longer than covalent bond.So in the arrangement certain vacant species are left which give cage like structure of ice. So the density of ice has less than water. Hence ice floats over water
● Ice melts at 0 degree and water freezes at the same temp. So both ice and water exist as 0 degree Celsius. When temp is increased the energy absorbed and H2 bonding between H2O molecule start breaking. H2O molecule come closes and Upto 4 degree Celsius the max H2 bonds break down. So vol become minimum and density become maximum at 4 degree Celsius.
● The attractive or repulsive force which exist between molecule of same or different substances are called intermolecular forces.
●Valence shell electron pair repulsion theory
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