Table 4.9 This photo shows the appearance of samples of magnesium metal before and after combustion. Before combustion After combustion All photos are Copyrighted by Maren Hansen. Al photos are Copyrighted by Maren Hansen Table 4.9 cont. The following is a photo that shows the results of adding HCI solution to solid samples of magnesium metal before and after combustion. Watch for the evolution of a gas as indicated by distinct bubbling on fizzing. After combustion
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.
Table 4.9 ( data)
Before combustion After combustion
Appearance of sample ________________ ______________
Result of adding HCI to sample________________ ______________
Table 4.10 ( report)
Test or observation Is a composition change indicated?
Sample appearance _______(Yes or no)
Addition of HCI _______(Yes or no)
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