Atomic structure Flashcards

1
Q

What is an atom?

A

The smallest part of an element that can exist

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1
Q

What is a compound?

A

Two or more elements chemically combined in fixed proportions

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2
Q

What is a mixture?

A

Two or more elements or compounds not chemically combined

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3
Q

What is filtration?

A

A process to separate solids and liquids

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4
Q

What is distillation?

A

A process to separate substances with different boiling points by evaporating and condensing

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5
Q

What is a chemical reaction?

A

A reaction that involves the formation of new elements or compounds

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6
Q

What happens during a physical reaction?

A

A substance changes state

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7
Q

What does an atomic number show?

A

The number of protons in the nucleus of an atom

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8
Q

How are elements arranged in the periodic table?

A

In order of increasing atomic number

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9
Q

What does the mass number show?

A

The sum of protons and neutrons in an atom

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10
Q

What is the maximum number of electrons allowed on the first shell?

A

2

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11
Q

What is the maximum number of electrons allowed on the second shell?

A

8

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12
Q

What is the maximum number of electrons allowed on the third shell?

A

8

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13
Q

What charge do protons have?

A

+1

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14
Q

What charge do neutrons have?

A

0

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15
Q

What charge do electrons have?

A

-1

16
Q

What is the relative mass of a proton?

A

1

17
Q

What is the relative mass of a neutron?

A

1

18
Q

What is the relative mass of an electron?

A

0.0005

19
Q

Name three people, who were involved in the development of the atomic model, in chronological order

A

JJ Thomson, Ernest Rutherford and Niels Bohr

20
Q

Who created the plum pudding model?

A

JJ Thomson

21
Q

Who created the nuclear model?

A

Ernest Rutherford

22
Q

Who created the Bohr model?

A

Niels Bohr