KEAN BIO 1000 - Chemistry Of Life (15 pages)

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Chemistry Of Life



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Chemistry Of Life

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Pages:
15
School:
Kean University
Course:
Bio 1000 - Principles Of Biology

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CONCEPTUAL LIFE SCIENCE CHEMISTRY OF LIFE Chemistry is the study of matter Life science involves the study of living things Since living things are made of matter knowledge of simple chemistry will help you to understand the principles underlying the structure and activities of living things ATOMS The atom is the smallest quantity of an element that still possesses the properties of the element The nucleus of the atoms contains the protons and the neutrons The electrons are found in shells that surround the nucleus Table III 1 contains information about the fundamental particles of the atom Table III 1 Fundamental particles of the atom Examples of atomic structure Hydrogen Hydrogen is the first and simplest element In the nucleus it has one proton In the electron shell is one electron For hydrogen the atomic number is 1 and the mass is 1 3 1 3 2 Figure 3 1 Formula and structure of hydrogen The atomic number is represented by the lower number and the atomic mass is represented by the upper number Helium Helium is the second element In the nucleus it has two protons and two neutrons There are two electrons in the electron shell For helium the atomic number is 2 and the mass is 4 Figure 3 2 Formula and structure of helium Lithium Lithium is the third element Its nucleus has three protons and four neutrons There are two electrons in the first shell and one electron in the second shell This is because the first shell only holds two electrons The capacity of the second shell is eight electrons 3 3 Figure 3 3 Formula and structure of lithium Lithium has two electron shells because the first shell only holds two electrons Carbon Carbon is element number 6 It has six protons and six neutrons There are six electrons two in the first shell and four in the second shell Its atomic number is 6 and its mass is 12 Figure 3 4 Formula and structure of carbon Oxygen Oxygen is element number 8 It has eight protons and eight neutrons in its nucleus It has eight electrons two in the



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