F321-The Atom Flashcards

0
Q

Where are electrons found?

A

In the shells of an atom

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1
Q

What does the nucleus of an atom contain?

A

Protons and neutrons

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2
Q

What is the relative charge and relative mass of a proton?

A

R Charge = 1+

R Mass = 1

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3
Q

What is the relative charge and relative mass of a neutron?

A

R charge = 0

R mass = 1

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4
Q

What is the relative charge and relative mass of an electron?

A

R charge = 1-

R mass = 1/2000 (negligible)

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5
Q

Define isotopes

A

Atoms of the same element with a different number of neutrons

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6
Q

What does the top number of an element represent?

A

Relative atomic mass (number of protons and neutrons)

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7
Q

What does the bottom number of an element represent?

A

Atomic number (number of protons/electrons)

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8
Q

Mass number

A

The number of protons and neutrons in the nucleus of an atom

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9
Q

Atomic number

A

The number of protons in the nucleus of an atom

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10
Q

What are the 3 isotopes of Hydrogen?

A

Protium, Deuterium, Tritium

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11
Q

Define relative isotopic mass

A

The mass of an atom of an isotope compared with 1/12th of the mass of an atom of C-12

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12
Q

Define relative atomic mass

A

The weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom of C-12

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13
Q

How do you calculate the relative atomic mass of an element?

A

Multiply together each percentage abundance by the isotope number individually. Then add them all together and divide by 100.

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14
Q

Do you add or subtract the number of a positive charge off/on to the electrons

A

Subtract

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15
Q

Do you add or subtract the number of a negative charge off/on to the electrons

A

Add