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.
In chemistry a formula is used to represent an element, a metal and a compound such that it uses chemical symbols to indicate the type of atoms present followed by subscripts to show the number of atoms of each type in the molecule.
- An element is represented with a formula of one or two letters of its name.
- Every metal is an element so it is also represented in the same way as element
Examples:
- Compound:
Ethane----- C2H6
- Element :
Chlorine---- Cl
- Metal:
Zinc ------ Zn
Answer:
All the above
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