309D S08 HW_1+A - NAME _key_ BIO 309D Homework #1 The...

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NAME ________ key _______________________                          BIO 309D  Homework #1 The Chemistry of Life 1.  An atom consists of an inner part, or nucleus, and an outer part called the electron cloud.  The nucleus is made up of  ____ protons ____ and ____ neutrons ___. 2.  Fill in the charge for each type of subatomic particle: a.  Proton ____ +1 ___ b.  Neutron ____ 0 ____ c.  Electron ____ -1 ____ 3.  The atomic number of an element indicates the number of ___ protons __ in the nucleus of the atom, and also tells us the number  of __ electrons __ outside the nucleus.  This number is unique for each element. 4.  The mass number of an element can vary.  This number is the sum of the ____ protons ___ and ___ neutrons ___ of an atom.  Thus, you can determine the number of __ neutrons __ by subtracting the atomic number from the mass number. 5.  Isotopes of an element differ in the number of neutrons found in the nucleus.  (A) One isotope of chlorine has 17 protons and 18 
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309D S08 HW_1+A - NAME _key_ BIO 309D Homework #1 The...

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