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Chemistry > Atoms, Ions And Compounds > Flashcards

Atoms, Ions And Compounds Flashcards

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1
Q

What does a mass spectrometer produce?

A

Mass spectra

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2
Q

How do you convert cm2 to dm2?

A

Divide by 1000

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3
Q

Define oxidising agent

A

Electron acceptor

Strips electrons off substances

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4
Q

Define reducing agent

A

Substance able to provide electrons

Electron donator

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5
Q

Define relative atomic mass

A

Weighted mean mass of one atom of an element compared to 1/12 the mass of a atom of carbon-12

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6
Q

Define relative isotopic mass

A

Mass of one atom of an isotope compared to the mass of 1/12 the atom of carbon-12

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7
Q

What is the chemical formula for an ammonium ion?

A

NH4 +

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8
Q

What is the chemical formula for a hydroxide ion?

A

OH -

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9
Q

What is the chemical formula for a silver ion?

A

Ag +

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10
Q

What is the chemical formula for a sulphate ion?

A

SO4 2-

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11
Q

What is the chemical formula for a nitrate ion?

A

NO3 -

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12
Q

What is the chemical formula for a zinc ion?

A

Zn 2+

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13
Q

What is the chemical formula for a scandium ion?

A

Sc 3+

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14
Q

What is the chemical formula for a carbonate ion?

A

CO3 2-

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15
Q

Define molar mass

A

Mass of substance per mole

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16
Q

What’s the equation for concentration?

A

n=cv

17
Q

What occurs if a 2+ ion is produced in a mass spectra?

A

M/z halfed

Abundance the same

18
Q

Describe how a mass spectra works

A

Substance vaporised

Ionised by bombarding with electrons

Accelerated and deflected using magnetic or electric fields

Heavier = Larger radius of curve

Dectector records m/z and abundance

19
Q

What ions must be produced in a mass spectrometer?

A

Positive

20
Q

What is the mass of an electron?

A

1/1836

21
Q

Why do isotopes have the same chemical properties as atoms of the same element?

A

Chemical properties are due to electronic structure which is the Same in both

22
Q

Why do isotopes have different physical properties to atoms of the same element?

A

Different mass numbers

So different densities and BP

23
Q

State whether the physical and chemical properties of atoms and isotopes of the same element are the same or different

A

Physical= different (different mass number (so density))

Chemical = same (same electronic structure)

24
Q

Compare molecular and formula mass

A

Molecular= small molecules

Formula= Larger molecules

25
Q

What goes of the axis of a mass spectra?

A

X= m/z (mass : charge)

Y= % abundance

26
Q

Compare the flight of heavy and light ions in a mass spectrometer

A

Heavy = Larger radius and longer flight time

Chemistry (28 decks)

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