atomic structure Flashcards

1
Q

what is the relative mass of a proton?

A

1

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2
Q

what is the relative mass of a neutron?

A

1

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3
Q

what is the relative mass of an electron?

A

0.0005

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4
Q

what is the relative charge of a proton?

A

+1

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5
Q

what is the relative charge of a neutron?

A

0

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6
Q

what is the relative charge of an electron?

A

-1

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7
Q

where are protons and neutrons found in an atom?

A

nucleus

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8
Q

where are electrons found in an atom?

A

in energy levels (shells)

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9
Q

what is the atomic number?

A

number of protons

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10
Q

what is the mass number?

A

total number of protons and neutrons

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11
Q

how do you work out the number of electrons?

A

same as protons

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12
Q

define ‘isotopes’

A

atoms with the same number of protons, but a different number of neutrons
they have the same atomic number, but different mass numbers

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13
Q

what is the relative atomic mass (RAM)?

A

average mass of an atom

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14
Q

how do you calculate the RAM of an atom?

A

%abundance x mass number / 100

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15
Q

what is an electron configuration?

A

shows how electrons are arranged

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16
Q

how many electrons can the first shell hold in an electron configuration?

A

2

17
Q

how many electrons can the second shell hold in an electron configuration?

A

8

18
Q

how many electrons can the third shell hold in an electron configuration?

A

8

19
Q

how many electrons can the fourth shell hold in an electron configuration?

A

2

20
Q

what is the electron configuration of aluminium (13 electrons)

A

2:8:3

21
Q

what are the rows called on the periodic table, and what do they show?

A

periods, show the number of occupied electron shells

22
Q

what are the columns called on the periodic table, and what do they show?

A

groups, number of electrons in outer shell