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Bond, Chemical Bond

Bond, Chemical Bond
Reading Level
     edHelper's suggested reading level:   grades 9 to 10
     Flesch-Kincaid grade level:   8.69

Vocabulary
     challenging words:    coefficient, hast, subscript, diatomic, equation, formula, compounds, multiplied, element, atom, retain, yield, naturally, exist, newly, within

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Bond, Chemical Bond
By Trista L. Pollard 		  
1     Stumbling through the football field at school, you come across a pure element.... Nope! That would never happen because elements in pure form are very rare in the Earth's crust. If you were to locate an element, you would notice that it is part of a compound. A compound is two or more elements that are joined together through a chemical bond. This chemical bond happens between the atoms of the elements involved.
 
2     When elements come together to produce compounds, the properties of the compound are different from its elements. To understand the process we need to break down the compound. Our first substance is a molecule, and molecules are known as the smallest unit of matter. They can exist on their own and they retain or keep all of their chemical properties. Molecules will have chemically bonded atoms when the molecules have 2 or more atoms. They may also be formed with atoms from the same element. There are special molecules, diatomic molecules, that occur naturally and contain only two atoms. Oxygen (O2) is a common diatomic molecule found in the air we breathe. You will recognize these molecules because they always have the number 2 as a subscript. This subscript stands for the number of atoms that are bonded together in molecule.
 
3     Speaking of numbers, scientists use chemical formulas to show how elements form compounds. Within compounds, elements always appear in the same relative amounts. This is why chemical formulas are used to represent compounds. Chemical formulas have letters and numbers that stand for the compound's elements. You will also see that amount of each element's atoms that are necessary to produce the compound. Most people are familiar with water or H2O. This chemical formula stands for two atoms of hydrogen and one atom of oxygen for every water molecule.

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