Using the Iron test results below, answer the question Iron Tests and the Results 1 A cube of Fe is hit with a hammer. The cube is flattened. 2 A cube of Fe is placed in 3 M HC1(aq). Bubbles of gas form 3 A cube of Fe is heated to 1811 K. The cube melts. 4 A cube of Fe is left in damp air. The cube rusts. 5 A cube of Fe is heated. The cube burns. Which tests demonstrate chemical properties? (1) 1, 3, and 4 (3) 2, 4, and 5 (2) 1, 3, and 5 (4)2 and 5
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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