10. Nitrogen, hydrogen, and ammonia (NH3) are all composed of molecules. What is it about a molecule of ammonia that makes it a compound, whereas hydrogen and nitrogen are elements? A) There are four atoms making up an ammonia molecule. B) The ammonia molecule contains atoms of two different types of elements. C) An ammonia molecule has more than one bond. D) An ammonia molecule has a larger mass than the sum of the masses of its constituent atoms.
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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