Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A-Level Chemistry > Module 2 chapter 2- Foundations In Chemistry > Flashcards

Module 2 chapter 2- Foundations In Chemistry Flashcards

1
Q

Explain what is meant by the term relative atomic mass of an element

A

The weighted mean mass of an atom compared with 1/12th the mass of one atom of carbon-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which statement is not correct for Group 2 metals?
A. An unpaired electrons is present in an s orbital
B. Chemical reactivity increases with increasing atomic number
C. the first ionisation energy decreases with increasing atomic number
D. Atomic radius increases with increasing atomic number

A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is meant by the term isotopes?

A

Atoms of an element with different number of neutrons and same number of protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Different isotopes of antimony have the same chemical properties.
Explain Why

A

They have the same number of electrons in the outer shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How to work out protons, electrons and neutrons

A 
Protons = Atomic Number 
Electrons = Atomic Number 
Neutrons = Mass Number - Atomic Number
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

State the similarities and differences between the atomic structure of isotopes of the same element.

A

similarities - same number of protons and electrons

differences - different number of neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explain why a small proportion of molecules in water have a relative molecular mass of 20

A

Different O/H isotopes are present

D2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Most elements contain different isotopes

State 2 differences between isotopes of the same element

A

Different physical properties

Different number of neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does a mass spectroscopy work?

A

sample is vaporised - gas form
Stage 1 - ionisation , an electron gun is used
Stage 2 - Acceleration - ion is excited/accelerated
Stage 3 - Deflection - the ion with more charge and less mass will deflect more
Stage 4 - Detection - Reaches the detector to produce a mass/charge ratio and produces a graph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the x and y axis for a mass spectrometer

A

Y axis - % Abundance

X axis - Mass to charge ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the function of a mass spectrometer

A

It identify molecules and shows isotopes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the formula for ammonium

A

NH4 +1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the formula for hydroxide

A

OH-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the formula for Nitrate

A

NO3-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the formula for Nitrite

A

NO2-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the formula for hydrogen carbonate

A

HCO3-

17
Q

What is the formula for Manganate(VII)

A

MnO4

18
Q

What is the formula for carbonate

A

CO3 2-

19
Q

What is the formula for sulfate

A

SO4 2-

20
Q

What is the formula for sulfite

A

SO3 2-

21
Q

What is the formula for dichromate

A

Cr2O7 2-

22
Q

What is the formula for phosphate

A

PO4 3-

23
Q

What is relative isotopic mass

A

The mass of an isotope relative to 1/12th of the mass of an atom of carbon 12

A-Level Chemistry (23 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions