1. Which of the following properties pertains to solids only? a. The kinetic energy is enough to overcome the attractive forces. b. The particles can slide past one another. c. They expand slightly when heated. d. They diffuse extremely slow because the particles are tightly packed. 2. Rank the matter based on decreasing relative strength of attractive forces between particles. a. liquid, solid, gas b. solid, liquid, gas C. gas, liquid, solid d. liquid, gas, solid 3. Which among the intermolecular forces is the weakest? a. hydrogen bond b. ion-dipole forces c. dispersion forces d. dipole-dipole forces 4. Which of the following is synonymous to dipoles? a. nonpolar molecules b. polar molecules c. charged atoms or group of atoms d. molecules with even sharing of electrons 5. Which intermolecular force is present in all molecules? c. dispersion forces d. dipole-dipole forces a. hydrogen bond b. ion-dipole forces

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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.