n which of the following pairs of properties are both properties chemical properties? (mark all correct responses) Choose all that apply. a) Has a density of 1.45 g/mL and does not react with water b) Melts below room temperature and does not react with methane c) Melts at 1,560oC and is not flammable d) Will breakdown plastic and may cause brain damage if inhaled e) Has a pungent smell and is a liquid at room temperature f) Will react with water to form hydrogen gas and is not flammable when stored dry

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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.