5. Consider the properties of four substances (A, B, C and D) in the following table. Substance A B C D Boiling point (°C) 2529 1768 2218 29 Ionic solid: Electrical conductivity in solid and liquid states Poor conductor in both Which substance is most likely a(n): Covalent network: Metallic solid: Conductive in liquid state but not in solid state Conductive in both liquid and solid states Poor conductor in both Other properties Hard Hard Thermal conductor Soft
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.
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