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18 Cards in this Set
- Front
- Back
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What are atoms made up of?
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Protons, neutrons, and electrons.
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Protons, Neutrons, and electrons are known as ___atomic particles.
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Subatomic
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What are the relative charges of different subatomic particles?
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Protons have a -1 charge, neutrons are neutral, and electrons have a -1 charge.
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Interesting fact: Why do we only use 1- to describe anions, instead of -1?
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To keep from mixing it up with other things! (Which you’ll see later in CH5!)
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What are the relative masses of protons, neutrons, and electrons?
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Protons have a relative mass of 1, neutrons 1, and electrons 1/1860.
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Why do we use relative masses and charges to describe the mass of subatomic particles, rather than actual masses?
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Because the actual masses and charges are very small! For example, the mass of a proton is 0.0000000000000000000000017g, and it has a charge of 0.00000000000000000016 coulomb! Working with such small numbers would therefore be very inconvenient!
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Define the term atomic number.
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?
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Define the term mass number.
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?
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What is an isotope?
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?
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When are atoms neutral?
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Protons = Electrons
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What name is given to an atom with an electrical charge?
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?
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Define the term “ion”.
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?
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How do you write the symbol for an element?
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Mass number on top, atomic number on bottom.
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What are the two main isotopes of Chlorine?
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?
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Give the mass number, atomic number, and number of neutrons and electrons of Chlorine-35 (Chlorine has 17 protons).
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Z (Symbol for mass number) = 35, A (Symbol for atomic number) = 17, neutrons = (35 – 17 = 18) 18, electrons = (number of electrons in a neutral atom = number of protons, so if Chlorine has 17 protons…) 17.
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What happens when the number of protons is higher than the number of electrons?
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?
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What is a cation?
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?
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What is an anion?
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?
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