As we look around space we find that most of it is composed of (4)_ hydrogen combines with carbon it forms a (5)_ which is the basis for all living things. Combining different (6) __together form different substances. A group of two or more atoms that are bonded together is called a (7)__ And when the elements are combined in a specific way, or ratio, the substance is called a (8)_ of hydrogen. When the (e.g. water). DELL
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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