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Cards In This Set
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Why do we study chemistry in biology?
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Because the body is made up of chemicals
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What is all matter made up of?
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Atoms
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What are the 3 partilces which make up an atom?
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Protons, neutrons, electrons
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What is the charge for the 3 particles that make up an atom?
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Protons = positive charge neutron = no associated charge (neutral) electrons = negative charge
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Where are each of the 3 particles that make up an atom found
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Protons and neutrons are located at the core in the dense nucleus. electrons are located int eh orbital outside the nucleus
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What is the atomic number
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The number of protons in the nucleus
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What is the mass number
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The number of protons plus neutrons in the nucleus
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What determines the chemical behavior of an atom
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Electrons
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How many electons are found in each shell
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The first electron shell can hold 2 electrons. The 2nd shell can hold up to 8 electrons. The 3rd shell can hold up to 8 electrons
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What does it mean if the outer electon shell is not full
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The atom is unstable or active – it can form a bond with another atoms
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What does it mean if the outer electon shell is full
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it is stable or inactive, it will not form a bond with another atom.
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Wats an ion
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Atoms that have gained or lost one or more electrons
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What is a cation? why does it have this charge?
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Cations is an ion that has a positive charge, it has lost an electron
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