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.
Solve the given question #3
The following rules are used to assign the R/S configurations to the chiral centers.
- Identify chiral centers in a molecule.
- Give the priorities (1, 2, 3 and 4 ) to the directly attached atom to chiral center based on atomic number..
- After giving the priorities keep the lowest priority away from the observer.
- See the priority direction, if clockwise then nomenclature as R and if anti-clockwise then nomenclature as S.
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