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Chemistry > Atomic structure > Flashcards

Atomic structure Flashcards

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1
Q

electrons have a relative mass of..

A

0

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2
Q

electrons have a relative charge of..

A

-1

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3
Q

electrons are located in..

A

the shells

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4
Q

neutrons have a relative mass of..

A

1

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5
Q

neutrons have a relative charge of..

A

0

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6
Q

neutrons are located in..

A

the nucleus

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7
Q

protons have a relative mass of..

A

1

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8
Q

protons have a relative charge of..

A

+1

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9
Q

protons are located in..

A

the nucleus

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10
Q

is the nucleus of an atom positive or negative?

A

positive

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11
Q

the nucleus contains..

A

protons and neutrons

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12
Q

protons are..

A

positive

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13
Q

neutrons are..

A

neutral

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14
Q

what is an atomic number of an element?

A

the number of protons in the nucleus of an atom

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15
Q

what is a mass number of an element?

A

the sum of the number of protons and neutrons in the nucleus of the atom

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16
Q

atoms of the same element can have different..

A

mass numbers due to a different numbers of neutrons

17
Q

electrons orbit the..

A

nucleus in shells or energy levels

18
Q

how many electrons does the first shell hold?

A

2

19
Q

how many electrons does the rest of the shells hold?

A

8

20
Q

what is the group number?

A

the number of outer shell electrons

21
Q

what are horizontal rows called?

A

periods

22
Q

what is an isotope?

A

they are atoms of the same element ie. have the same atomic number but different mass

23
Q

isotopes have the same number of..

A

protons and electrons

24
Q

isotopes have the different number of..

A

neutrons

25
Q

what is the definition of relative atomic mass?

A

is the average mass of an atom of the element compared to 1/12th the mass of an atom of carbon-12

Chemistry (13 decks)

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