Lecture 6 - Atoms and the Periodic Table Flashcards

1
Q

mass (g) of a proton

A

1.6726 x 10^-24

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2
Q

mass (g) of a neutron

A

1.6749 x 10^-24

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3
Q

mass (g) of an electron

A

9.1093 x 10^-28

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4
Q

What is the Angstrom scale?

A

10^-10 m - 10th of a nanometer

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5
Q

What is Atomic Weight?

A

a weighted average based on how often you can see an isotope in nature

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6
Q

What is the equation to find atomic weight?

A

1 x % = ?
2 x % = ?
? + ? = atomic weight
(1 and 2 being different isotopes)

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7
Q

what is mass number (a)?

A

the number of protons + the number of neutrons

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