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21 Cards in this Set
- Front
- Back
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What does the atom consist of?
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It consist of:
-Positive entities, protons. -Negative entities, electrons. -Neutral entities. neutrons. |
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Where are protons and neutrons located?
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In the nucleus of the atom.
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Where are the electrons located?
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Outside of the nucleus.
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What's an isotope?
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They're different versions of the sale element, meaning they have the same number of protons but different number of neutrons.
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What's the electron mass?
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9.109 x 10^-28g
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How much greater is the mass of protons and neutrons in comparison to electrons?
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They're 1836 times bigger in mass.
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What does Z stand for?
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Atomic number.
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What's atomic number?
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The number of protons in the nucleus, which is equal to the number of electrons.
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What's Mass number?
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The number of protons and neutrons in the nucleus.
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What does A stand for?
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Mass number.
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1 H weighs?
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1.6735 x 10^24g.
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What's the mass of 12C?
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12 amu.
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How much does 1 amu weigh?
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1.66054 x 10^24g.
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How many amu is 1g?
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6.02214 x 10^23amu.
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What does FM stand for?
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Formula mass.
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What's formula mass?
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It's the sum of atomic masses.
eg. X * FM(A) + X * FM(B)= X amu |
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What's Molecular mass?
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It's the sum of atomic masses of all atoms in a molecule.
eg. X (A)amu + X(B)amu= X g |
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What does MS stand for?
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Molecular mass.
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What's mole?
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Measures chemical quantity.
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How much is one mole of something?
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6.0221367 of something.
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What's avogados number?
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6.02 x 10^23
eg. 1 mol of Na = 6.02 x 10^23 Na atoms. |
