The given statements are from a description of the element lead in a reference handbook. Classify each statement as a qualitativ or quantitative description of lead. Its elemental symbol is Pb. Qualitative It has a density of 11.3 g . cm-³. Its molecular mass is 207.2 amu. Answer Bank It has a melting point of 327.462 °C and a boiling point of 1749 °C. Quantitative It is a bluish-white metal of bright luster. It is very soft, highly malleable, ductile, and a poor conductor of electricity.
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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