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GCSE - Chemistry (Old) > Atomic Structure > Flashcards

Atomic Structure Flashcards

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1
Q

What does an atom have to have the same number of to be the same element?

A

Protons

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2
Q

Why do we use protons to define elements?

A

Unlike electrons and neutrons they are not easily lost/changeable

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3
Q

When you move across a period, what does the atomic number increase by?

A

1

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4
Q

What is the relative mass of an electron?

A

1/1836

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5
Q

Why do we not include the weight of electrons in the RAM?

A

It is insignificantly small in mass

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6
Q

What is an isotope?

A

Atoms of the same element with different numbers of neutrons

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7
Q

Since isotopes have the same number of electrons, what are they?

A

Chemically identical

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8
Q

What determines the chemical properties of an atom?

A

Electrons

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9
Q

How do you work out the number of neutrons in an atom?

A

Mass number - Atomic number

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10
Q

What does RAM stand for?

A

Relative Atomic Mass

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11
Q

How do you work out the RAM if there are isotopes?

A

Multiply each isotopic mass by the abundance
Add together
Divide by the sum of the relative abundances

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12
Q

As the energy levels get further from the nucleus what do they get?

A

Higher energy

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13
Q

What energy level can actually hold more than 8 electrons?

A

The third level

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14
Q

What do group ones electron configuration have in common?

A

1 electron in outer energy level

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15
Q

How does the group number correspond to the number of electrons in the atoms outer shell?

A

It equals the amount in the outer shell (0= full energy shell)

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16
Q

Describe the atom

A

A central nucleus containing the protons and neutrons, with electrons orbiting it within energy shells

17
Q

What happens if you add the RAM of each element in a molecule?

A

You get the RFM (Relative Formula Mass)

18
Q

What are the charges of electrons, neutrons, and protons?

A

-1
0
1

19
Q

What is the relative mass of a neutron/proton?

A

1

GCSE - Chemistry (Old) (14 decks)

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