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Chemistry > Atomic Structure > Flashcards

Atomic Structure Flashcards

0
Q

What did J.J Thomson discover?

A

Even smaller particles can be pulled out of atoms using a very high voltage - the discovery of the electron

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1
Q

What idea was put forward byJohn Dalton?

A

Everything is made from atoms.

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2
Q

What did Ernest Rutherford discover?

A

Atoms are not solid but they have a very dense centre called a nucleus.

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3
Q

What did Niels Bohr discover?

A

‘The solar system atom’ - the nucleus in the centre (sun) with the electrons orbiting around it (planets)

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4
Q

What type of mass do atoms have?

A

Low

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5
Q

What’s it the middle of an atom?

A

Nucleus

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6
Q

What charge does a nucleus have?

A

Postive

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7
Q

What is a nucleus made up of?

A

Protons and neutrons

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8
Q

What charge do protons have?

A

Positive

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9
Q

What charge do neutrons have?

A

Neutral

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10
Q

What charge do electrons have?

A

Negative

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11
Q

What is the space around a nucleus filled with?

A

Electrons

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12
Q

What are electrons arranged in?

A

Shells

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13
Q

What charge does an atom have?

A

No charge

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14
Q

What is an element?

A

Something that cannot be broken down chemically and contains only one type of atom

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15
Q

What is a compound?

A

Something that contains at least two elements that are chemically combined

16
Q

In the periodic table, what number is underneath the element?

A

Atomic number

17
Q

What is atomic number?

A

Number of protons in the atom

18
Q

What is an isotope?

A

Elements that have same atomic number but different mass number

19
Q

What is the mass number?

A

Total number of protons and neutrons in an atom

20
Q

Isotopes have the…

A

Same atomic number but a different mass number

21
Q

How many electrons are in the first shell?

A

2

22
Q

How many electrons can an outer shell hold in order to become full?

A

8

23
Q

Elements in the same group have the same number of…

A

Electrons

24
Q

What is the relative mass of a proton?

A

1

25
Q

What is the relative mass of a neutron?

A

1

26
Q

What is the relative mass of an electron?

A

0.0005

27
Q

What is the relative charge of a proton?

A

+1

28
Q

What is the relative charge of a neutron?

A

0

29
Q

What is the relative charge of an electron?

A

-1

30
Q

What is the radius of an atom?

A

10-10m

31
Q

What is the mass of an atom?

A

10-23g

32
Q

What does the number of the period (row) tell us?

A

Number of electron shells

33
Q

What does the number of the group (column) tell us?

A

How many electrons are in the outer shell

Chemistry (8 decks)

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