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Chapter 3 - • carbon hydrogen oxygen most abundant...

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A single  proton  or  neutron  has a mass of about 1 dalton (Da), which is 1.7 × 10 −24  grams Stars have abundant hydrogen and helium Earths crust and surface of neighboring plants are almost half oxygen, 28 percet silicon, 8 percent  aluminum, and 2-5 percent each of sodium, magnesium, potassium, calcium, and iron 98% of mass of living organism = 6 elements o Carbon, hydrogen, nitrogen, oxygen, phosphours, and sulfure sodium and potassium essential for nerve function calcium can act as biological signal iodine component of a vital hormone
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Unformatted text preview: • carbon hydrogen oxygen- most abundant elements in human skin cell • radioisotopes are unstable and spontaneously give off energy in for of alpha, beta or gamma radiation from the atomic nuclus- radioactive decay • electron orbital is the region of space where the electron is found 90 percent of the time • orbital can be occupied by a maximum of 2 electrons • first shell – s orbital • second shell – p orbital – 4 orbitals- 8 electrons • hydrophobic interactions can hold two nonpolar molecules together •...
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