Possible Questions Flashcards

1
Q

What was Robert Boyle’s contribution to science?

A

He gave the first accurate definition of an element

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2
Q

Define an element.

A

An element is a substance that cannot be split into simpler substances by chemical means

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3
Q

Who gave the first accurate definition of an element?

A

Robert Boyle

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4
Q

What was Humphry Davy’s contribution to science?

A

He discovered potassium, sodium, calcium, barium, strontium and magnesium by passing electricity through compounds containing these elements

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5
Q

Who discovered a range of elements by passing electricity through compounds?

A

Humphry Davy

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6
Q

What was Johann Dobereiner’s contribution to science?

A

He arranged the elements as triads e.g. chlorine, bromine and iodine

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7
Q

Give an example of a Dobereiner triad.

A

Chlorine

Bromine

Iodine

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8
Q

Define a triad

A

A triad is a group of three elements with similar chemical properties in which the atomic weight/relative atomic mass of the middle element is approximately equal to the average of the other two

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9
Q

Who arranged the elements in triads?

A

Johann Dobereiner

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10
Q

What was John Newland’s contribution to science?

A

John arranged the elements in order of increasing atomic weight and noticed that the properties seemed to repeat with every eight (Newland’s Octaves)

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11
Q

What are Newland’s Octaves?

A

Newland’s Octaves are arrangements of elements in which the first and the eight element, counting from a particular element, have similar properties

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12
Q

Who arranged the elements in octaves?

A

John Newland

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13
Q

What was Mendeleev’s contribution to science?

A

He arranged the elements in order of increasing atomic weight and placed elements with similar properties under each other in groups, leaving gaps.

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14
Q

Define Dmitri Mendeleev’s Periodic Law.

A

When elements are arranged in order of increasing atomic weight the properties of the elements recur periodically, i.e. the properties displayed by an element are repeated at regular intervals in other elements

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15
Q

Who was the first to leave gaps in their table when arranging the elements according to increasing atomic weight?

A

Dmitri Mendeleev

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16
Q

What was Henry Mosley’s contribution to science?

A

He discovered a method of determining the number of protons in the nucleus of an atom - atomic number and arranged the elements by increasing atomic number

17
Q

Who discovered a method of determining the number of protons in the nucleus of an atom?

A

Henry Mosley

18
Q

What was Francis William Aston’s contribution to science?

A

He built the mass spectrometer

19
Q

Who built the mass spectrometer?

A

Francis William Aston

20
Q

What was Friedrich Hund’s contribution to science?

A

He put forward Hund’s Rule of Maximum Multiplicity

21
Q

Who put forward the Rule of Maximum Multiplicity?

A

Friedrich Hund

22
Q

What was Wolfgang Pauli’s contribution to science?

A

He deducted the Pauli Exclusion Principle

23
Q

Who deducted the __ Exclusion Principle?

A

Wolfgang Pauli