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.
1. ____N2 + 3H2 ____NH3
2. ____ KClO3 ____ KCl + 3 O2
3. ____NaCl + ____F2 2NaF + ____Cl2
4. ____H2 + ____O2 2H2O
5. 2 AgNO3
6. ____ AlBr3
7. ____CH4
8. ____C3H8
9. ____ C8H18 + 25 O2 ____ CO2
10. ____ FeCl3 + ____ NaOH ____ Fe(OH)3 + 3 NaCl
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