Water Hydrogen molecules bonds Figure 6.6 The lattice structure of an ice crystal, showing its hexagonal arrangement at the molecular level. The space taken by 24 water mol- ecules in the solid lattice could be occupied by 27 water molecules in liquid state, so water expands about 9% as the crystal forms. Because of the way molecules are arranged during freezing, ice is less dense than liquid water and floats.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Would ice still float if water molecules in ice occupied the same space as water molecules in liquid water?
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